Nautel NV30, NV40, NV5, NV3.5 Maintance Manual

Download

NV30/NV40 Transmitter

Operations and Maintenance Manual

Document:NHB-NV30-NV40-OPS-3.3

Issue: 3.3 2014-12-10

Status: Standard

Nautel Limited

10089 Peggy’s Cove Road Hackett’s Cove, NS Canada B3Z 3J4 Phone: +1.902.823.3900 or Toll Free: +1.877.6NAUTEL (6628835) (Canada & USA only) Fax: +1.902.823.3183

Nautel Inc.

201 Target Industrial Circle Bangor, Maine USA 04401 Phone: +1.207.947.8200 Fax: +1.207.947.3693

Customer Service (24 hour support)

+1.877.628.8353 (Canada & USA only) +1.902.823.5100 (International)

Email: support@nautel.com Web: www.nautel.com

The comparisons and other information provided in this document have been prepared in good faith based on publicly available information. The reader is encouraged to consult the respective manufacturer's most recent published data for verification.

NV30/NV40 Operations and Maintenance Manual Table of contents

Contents

Release control record vii

Description 1-1

Ac-dc power stage 1-2

Control/monitor stage 1-3

RF drive stage 1-4

RF power stage 1-6

Operating the transmitter 2-1

Using the AUI 2-2

Home page 2-14

Menu page - describing transmitter operations 2-15

Logs page - viewing transmitter log 2-16

Viewing tool menu panels 2-25

Viewing real-time meters 2-40

Presets - editing operational settings 2-44

Viewing transmitter status 2-59

Factory Settings 2-61

System Settings 2-70

User accounts 2-79

Changeover page 2-83

User settings 2-84

Remote I/O page 2-104

Routine maintenance 3-1

Scheduled maintenance 3-1

Replacing an air filter 3-3

Performing on-air checks 3-5

Page v

NV30/NV40 Operations and Maintenance Manual Table of contents

Replacing the control/interface PWB battery 3-6

Replacing the NVE exciter PWB battery 3-7

Inspecting lightning protection systems 3-8

Non-standard maintenance 4-1

Upgrading software 4-1

Improving transmitter performance for IBOC presets 4-4

Changing the RF output connector 4-6

Bypassing the UPS interface option 4-11

List of terms 5-1

Page vi Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual

Release control record

Issue Date Reason

3.0 2011-11-10 Release 3 of product (NARF50B)

3.1 2012-12-15 Section 2: updated to support software release 4.0 Section 3: expanded air filter descriptions to include

M7, MERV 7 filters as suitable replacements

3.2 2013-10-01 Added Nautel Phone Home to User Settings

3.3 2014-12-10 Section 2: updated to support software release 4.2.7 or later; changed exciter TCXO screen to show dual exciter option

Issue 3.3 2014-12-10 Page vii

NV30/NV40 Operations and Maintenance Manual

Page viii Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Description

Section 1: Description

Refer to the functional block diagram: NV Series Transmitter Block Diagram - see page 1-9.

This section provides a high-level description of the transmitter’s key sections. The transmitter circuitry is subdivided into four basic stages:

• Ac-dc power stage

• Control/monitor stage - see page 1-3

• RF drive stage - see page 1-4

• RF power stage - see page 1-6

NV30/NV40 electrical schematics

Some descriptions in this section refer to electrical schematics (SD-#s) . These are located in Section 5 of the NV30/NV40 Troubleshooting Manual.

Redundancy

The NV30/NV40 features redundancy in all key systems:

• RF power modules

• Exciters

• Cooling fans

• Cooling fan power supplies

• Low voltage power supplies

• SBC/AUI power supplies

Issue 3.3 2014-12-10 Page 1-1

NV30/NV40 Operations and Maintenance Manual Description

Ac-dc power stage

See electrical schematics SD-1 (A, B or C), SD-2 and SD-3.

The ac-dc power stage converts the ac power source to a positive dc voltage (PA volts) for the transmitter's intermediate (IPA) and RF power amplifiers. The transmitter accepts a wide range of ac input voltage options:

– 3-phase, 180 - 264 V ac (208 V ac nominal) – 3-phase, 312 - 457 V ac (380 V ac nominal) – 1-phase, 180 - 264 V ac (240 V ac nominal)

The ac-dc power stage provides power to operate cooling fans in the power supply modules, RF power modules and reject load modules. It also provides power to the low voltage power supplies, which generate the low level dc voltages (±15 V and +5 V) used throughout the transmitter, and to the +12 V dc power supplies for the SBC (single-board computer) and AUI (advanced user interface).

The ac-dc power stage comprises ac input terminal blocks TB1, TB2 and TB3, an ac distribution assembly (A6), a power supply distribution PWB (A7), SBC/AUI power supplies A (U1) and B (U2), LVPS modules A (U3) and B (U4), fan power supply modules A (U7) and B (U8), IPA power supply modules A (U9), B (U10) and C (U11), and dual PA power supply modules (U12 through U43) for each of the 16 RF power modules. There is also a PS interface PWB associated with each power supply module (fan, IPA and PA).

Power supply modules

See Figure SD-2. Power supply modules U9 through U43 convert the ac input voltage to a regulated dc supply (IPA volts and PA volts) for 16 RF power modules (module contains both IPA and PA). Each switching power supply module provides 2000 W output, at typical levels of 50 V and 40 A. The modules regulate the output voltage based on a PA (or IPA) Volts Control input from the control/ monitor stage. Test points on the associated PS interface PWB allow monitoring of module presence and ac input status. Each module has a built-in cooling fan and each senses out-of-regulation and excessive temperature conditions and applies PS Fail and PS Temp alarm signals to the associated RF power module. Both conditions cause the power supply to shut itself down, thus reducing the transmitter's RF output.

The same modules are used for fan power supply modules U7 and U8. Their PS Fail and PS Temp alarm signals, as well as the PS Module Present status signal, are applied to the control/monitor stage.

Page 1-2 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Description

LVPS modules

See Figure SD-1 (A, B or C). LVPS modules A (U3) and B (U4) convert the ac input voltage to the regulated low voltage dc supplies. The +5 V, +15 V and -15 V regulated outputs of the supplies are ORed together at the control/interface PWB (A1) and applied throughout the transmitter.

+12 V power supply modules

See Figure SD-1 (A, B or C). +12 V power supply modules A (U1) and B (U2) convert the ac input voltage to the regulated +12 V dc supplies. The +12 V outputs are ORed together on the power supply distribution PWB (A7) and a common +12 V supply is applied to the control/monitor stage.

Power supply distribution PWB

See Figures SD-1 (A, B or C) and SD-3. The power supply distribution PWB (A7) interfaces between fan power supply modules U7 and U8 and the cooling fans for RF power modules 1 through 16 and reject loads A, B and C. The fan voltage (+48 V) is applied via power rectifiers CR1 and CR2 to the transmitter's cooling fans. A nominal 47 V is applied as Fan V Sample A and B to the control/monitor stage for metering and fan PS fault detection.

The power supply distribution PWB also interfaces between SBC/AUI power supplies U1 and U2 and the control/monitor stage. +12 V is applied via power rectifiers CR3 and CR4 to the control/ monitor stage. A nominal +12 V is applied as +12V Sample A and B to the control/monitor stage for metering and supply fault detection.

Control/monitor stage

See electrical schematics SD-4 and SD-5 and Figure 1.1 on page 1-4. The control/monitor stage monitors critical samples and status/alarm signals from the ac-dc power stage, RF drive stage and RF power stage. For example, RF power monitoring and RF power stage status information is applied to the control/monitor stage. Based on the value and status of each input, the control/monitor stage produces the appropriate control signals for the RF power stage to ensure the proper operation and protection of the transmitter. The control/monitor stage also provides the remote control/monitor interface for the transmitter.

The control/monitor stage comprises a control/interface PWB (A1), a remote interface PWB (A2), an LCD touch monitor (U5) and a single-board computer (U6).

U5 is a 17-inch, colour LCD screen that is mounted on the front of the transmitter. It provides an advanced user interface (AUI) for the transmitter. The AUI can be controlled by touch screen and is also available as a flash graphic on any web-interfaced PC or handheld device via the internal NV web server. See “Using the AUI” on page 2-2 for detailed information on AUI functionality.

Issue 3.3 2014-12-10 Page 1-3

NV30/NV40 Operations and Maintenance Manual Description

From RF Power Stage

From Ac-Dc Power Stage

AUI

To RF Power Stage

To Ac-Dc Power Stage

Control/

Interface

PWB

To RF Drive Stage

From RF Drive Stage

From Remote

Controller

To Remote Monitor

(part of) Remote

Interface

PWB

(part of) Remote

Interface

PWB

The control/interface PWB contains push-button switches that provide backup control for the RF on/off, local/remote, power increase/decrease and reset functions. It also contains LEDs that serve as an alternate means to monitor status (local/remote and RF on/off), forward power level (percentage indicators from 10% to 100% of maximum RF output power) and various alarms.

Figure 1.1: Control/Monitor Stage

RF drive stage

See Figure SD-6. The RF drive stage converts the exciter's RF output to the intermediate RF level needed to drive the RF power modules. It consists of exciter A (A3), exciter B (A4, optional) and RF drive splitter/changeover assembly (A5).

Exciter(s)

Refer to the functional block diagram: NVE300 Exciter Block Diagram - see page 1-10.

Exciters A (A3) and B (A4) are the RF drive sources for the transmitter. They accept the external audio program and/or IBOC information (see the NV30/NV40 Installation Manual for details on various program input types). The exciters’ main/standby operation is controlled locally using the AUI, or remotely. The exciter outputs are applied to the RF drive splitter/changeover assembly (A5). The exciter provides an RF drive signal of 130 W (in analog mode).

Page 1-4 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Description

RF drive splitter/changeover assembly

The RF drive splitter/changeover assembly (A5) controls the routing of the main and standby exciters and provides the RF drive signals for the 16 RF power modules. The assembly is comprised of the splitter/changeover PWB (A5A1), two 4-way RF drive splitter PWBs (A2 and A3), two attenuator PWBs (A4 and A5) and eight 3 dB hybrid couplers (U1 through U8).

Exciter relay control

The RF drive outputs from exciters A and B are applied to the splitter/changeover PWB (A5A1) at A5A1J1 and A5A1J2 respectively. The Exciter Relay Control input (A5A1J3-4) is a signal applied from the control/monitor stage that controls relay A5A1K1.

• When exciter A is selected as the main RF drive source, the Exciter Relay Control input is open circuit and relay A5A1K1 will be de-energized. Exciter A's output will be applied to 3 dB hybrid coupler A5A1U1.

• When exciter B is selected as the main RF drive source, the Exciter Relay Control input is near ground potential (0 V) and relay A5A1K1 will be energized. Exciter B's output will be applied to 3 dB hybrid coupler A5A1U1.

Exciter drive splitter

The splitter/changeover PWB’s 3 dB hybrid coupler (A5A1U1) is connected as a splitter. The RF drive source (A or B) selected by relay A5A1K1 is applied to A5A1U1’s input. The signal is split into two equal amplitude signals that are 90° out-of-phase. These split signals are applied to 4-way RF drive splitter PWBs A5A2 and A5A3.

4-way RF drive splitter

Each 4-way RF drive splitter PWB (A5A2 and A5A3) accepts an output from the exciter 3 dB hybrid coupler and splits it into four equal amplitude signals, using three 3 dB couplers identical to A5A1U1. The outputs of each 4-way RF drive splitter are applied to the final RF drive splitters.

Final RF drive splitters

3 dB hybrid couplers A5U1 through A5U8 (identical to A5A1U1) are connected as splitters. Each coupler accepts an output of the 4-way RF drive splitters and splits the signal into two equal amplitude signals that are 90° out-of-phase. These split signals are applied to attenuator PWB A5A4 and A5A5.

Attenuators

The attenuator PWBs (A5A4 and A5A5) accepts the outputs from the 4-way RF drive splitter PWBs and attenuate each of the signals for application to the 16 RF power modules. Attenuation values are set in order to balance the RF drive output levels.

Issue 3.3 2014-12-10 Page 1-5

NV30/NV40 Operations and Maintenance Manual Description

RF power stage

See Figures SD-7, SD-8 and SD-9. The RF power stage accepts the intermediate RF drive inputs from the RF drive stage and generates the final RF output. It consists of 16 RF power modules, four module backplane PWBs (A17, A32, A50 and A65), four 10 kW combiner/filters (A16, A31, A49 and A64), two 20 kW combiners (A30 and A63), a 40 kW combiner (A48), an output power probe (A13), three reject load assemblies [A (A14, 8-input), B (A45, 4-input) and C (A46, 4-input)] and two reject load interface PWBs [A (A15) and B (A47)].

RF power module

See Figure SD-7 (see the NV30/NV40 Troubleshooting Manual for a detailed RF power module description) and

Each of the 16 RF power modules provides up to 2750 W (for NV40) or 2062.5 W (for NV30) of RF output power and is comprised of an IPA power amplifier PWB, eight power amplifier PWBs, power module interface PWB, combiner PWB, splitter PWB and six cooling fans. The intermediate RF drive outputs from the RF drive stage are applied to the RF power modules via module backplane PWBs 14 (A17), 5-8 (A32), 9-12 (A50) and 13-16 (A65). Within each RF power module, the intermediate RF drive signal is sampled and then drives the IPA amplifier. The IPA output is sampled then split to drive the module's eight PAs. The IPA Volts and PA Vol t s inputs from the associated switching power supply modules control the RF output of the IPA and eight PAs, respectively. The RF power module receives alarm and status signals (PS Temp, PS Fail, PS AC Fail, and PS Module Present) from the ac-dc power stage. The RF power module also provides a Pwr Supply Inhibit signal (one for each of the power module’s dual supplies) to the ac-dc power stage, which, when active, inhibits the associated switching power supply. A PA V Sample and IPA V sample from each RF power module is applied to the control/monitor stage. The control/monitor stage supplies a PA Volts Inhibit signal, which controls the PA outputs of the RF power module.

“RF Power Module Block Diagram” on page 1-11.

Module backplane PWB

See Figure SD-7. Each set of four RF power modules (1-4, 5-8, 9-12 and 13-16) has an associated module backplane PWB which interfaces with all module inputs and outputs, except for the RF output. It also provides the fan volts connections for the module's cooling fans. The setting of dipswitches S1 through S4 assign a four-bit address for each specific module based on module position. Jumper E1 is set to TERM on RF power module 16 (the last module) to terminate the RS485 serial communication cable.

Combiner/filters

See Figure SD-8. There are various stages of combiners used in the transmitter. All combining follows a corporate (or binary) structure in that pairs of RF power blocks are combined throughout the RF chain from the RF power modules to the RF output.

Page 1-6 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Description

10 kW combiner/filters

Each 10 kW combiner/filter (A16, A31, A49 and A64) is a 2-stage combiner that accepts the RF outputs from four RF power modules and provides a single RF output. Each 10 kW combiner/filter uses three 3 dB hybrid couplers - two of which are used in the initial pair of 5 kW combiners, which each accept the outputs of two RF power modules. The equal amplitude, 90° out-of-phase (quadrature) RF signals are combined at the 3 dB hybrid coupler outputs and applied to a third and final, 10 kW 3 dB hybrid coupler. Again, the equal amplitude, quadrature RF signals are combined. The combined output is applied to a 10 kW low pass filter before being applied to a 20 kW combiner.

Any amplitude or phase imbalances between 3 dB hybrid coupler inputs cause a proportional signal to be applied to the applicable reject load assemblies. The amplitude of the 5 kW Rej Ld Pwr signals (via J5 and J6) represents imbalance between the combined outputs of the first stage of combining. The amplitude of the 10 kW Rej Ld Pwr signal (via J7) represents imbalance between the combined outputs of the second stage of combining (differences in pairs of RF power modules).

20 kW combiners

The 20 kW combiners (A30 and A63), which are hybrid couplers, accept the RF outputs from the 10 kW combiner/filters. The equal amplitude, 90° out-of-phase (quadrature) RF signals are combined at hybrid coupler outputs and applied to the 40 kW combiner.

Any amplitude and phase imbalances between the inputs of the 20 kW combiners causes a proportional signal to be applied (via J1) to the applicable reject load assemblies. The amplitude of the 20 kW Rej Ld Pwr signals represents imbalance between the combiner inputs.

40 kW combiner

The 40 kW combiner (A48), which is a hybrid coupler, accepts the RF outputs from the 20 kW combiners. The equal amplitude, 90° out-of-phase (quadrature) RF signals are combined at the hybrid coupler output and applied to the output power probe.

Any amplitude and phase imbalances between the inputs of the 40 kW combiner causes a proportional signal to be applied (via J1) to the applicable reject load assembly. The amplitude of the 40 kW Rej Ld Pwr signal represents imbalance between the combiner inputs.

Output power probe

See Figure SD-8. The output power probe (A13) monitors the transmitter's forward and reflected power and generates the Fwd Pwr Sample (A1J1) and Refld Pwr Sample (A2J1) signals applied to the control/monitor stage for protection and monitoring. RF monitor PWB A3 provides a nominal 4.5 V (NV40) or 3.7 (NV30) rms [at 40 kW (NV40) or 30 kW (NV30) signal at A3J1 for use with a

Issue 3.3 2014-12-10 Page 1-7

NV30/NV40 Operations and Maintenance Manual Description

modulation monitor or spectrum analyzer. RF sample PWBs A4 and A5 provide similar samples at A4J1 and A5J1. These samples are applied to exciters A and B (if used) for use by the exciters' adaptive pre-correction circuitry [for all-digital (HD) or hybrid (FM+HD) modes of operation] and also by the AUI’s spectrum analyzer display.

Reject load assemblies

See Figure SD-9. Reject load assemblies provide a means to dissipate reject power from the outputs of the combiner/filter's 3 dB hybrid couplers. Reject load assemblies contain power resistors to dissipate reject power and cooling fans to regulate temperature. There are three different reject load assemblies (A, B and C) used in the transmitter.

8-input reject load assembly ‘A’

Reject power generated by the 5 kW combining stage of any of the four 10 kW combiner/filter assemblies is dissipated by resistors in 8-input reject load assembly ‘A’ (A14). Micro-strip transmission lines (on 8-input reject load PWB A14A1) in close proximity to the reject load signals induce eight true RF sample voltages of the associated reject power. These samples are peak detected and applied to the control/monitor stage via reject load interface PWB ‘A’ (A15). The reject load interface PWB provides an interface between the ac-dc power stage’s Fan Volts supply and the reject load assembly’s cooling fans. It also acts as the interface between the cooling fans’ Rej Fan Tach signals and the control/monitor stage.

4-input reject load assembly ‘B’

Reject power generated by the output combining stage of any of the four 10 kW combiner/filter assemblies is dissipated by resistors in 4-input reject load assembly ‘B’ (A45). Micro-strip transmission lines (on 4-input reject load PWB A45A1) in close proximity to the reject load signals induce four true RF sample voltages of the associated reject power. These samples are peak detected and applied to the control/monitor stage via reject load interface PWB ‘B’ (A47). The reject load interface PWB provides an interface between the ac-dc power stage’s Fa n Volts supply and the reject load assembly’s cooling fans. It also acts as the interface between the cooling fans’ Rej Fan Tach signals and the control/monitor stage.

4-input reject load assembly ‘C’

Reject power generated by the output combining stage of either of the two 20 kW combiners or the 40 kW combiner is dissipated by resistors in 4-input reject load assembly ‘C’ (A46). Micro-strip transmission lines (on 4-input reject load PWB A46A1) in close proximity to the reject load signals induce three true RF sample voltages of the associated reject power. These samples are peak detected and applied to the control/monitor stage via reject load interface PWB ‘B’ (A47). The reject load interface PWB provides an interface between the ac-dc power stage’s Fa n Volts supply and the reject load assembly’s cooling fans. It also acts as the interface between the cooling fans’ Rej Fan Tach signals and the control/monitor stage.

Page 1-8 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual

Issue 3.3 2014-12-10 Page 1-9

Figure 1.2: NV Series Transmitter Block Diagram

FAN

PWR

IPA

PA4

PA3

PA2

PA1

PWR

REJ

PWR

REJ

PWR

IPA

FWD

PA8

PA5

PA6

PA7

FWD

AUI

PWR

REMOTE CONTROL/

AC POWER

240VAC

AC POWER

208VAC

3 PHASE

AC POWER

IPA

PWR

EXCTR

SUPPLY

SBC/AUI

SUPPLY

PWR SUPPLY

MODULE C

MODULE A

PWR

REJ PWR

PWR

FILTER

REJ PWR

PWR

PROBE

POWER

MONITORING

1 PHASE

3 PHASE

400VAC

SUPPLY

LV PWR

IPA

LV PWR

IPA

FWD

LV PWR

IPA PWR SUPPLY

PWR SUPPLY

SPLITTER

MODULE D

MODULE B

COMBINER

REFLD

SBC

REJ

OUTPUT

B2060004 VE

FAN PWR SUPPLY

EXCITER B

IPA PWR SUPPLY

EXCITER A

INTEGRAL EXCITER

FAN PWR SUPPLY

(OPTIONAL)

SUPPLY B

(OPTIONAL)

SBC/AUI PWR

SUPPLY B

(OPTIONAL)

PWR SUPPLY

SBC/AUI PWR SUPPLY

10KW POWER BLOCK

PWR SUPPLY

10KW POWER BLOCK

RF OUTPUT

(OPTIONAL)

IPA PWR SUPPLY

FAN PWR SUPPLY

16 WAY

SPLITTER

IPA PWR SUPPLY

FAN PWR SUPPLY

FAN SUPPLY

IPA PWR SUPPLY

SBC/AUI PWR

PWR SUPPLY

SUPPLY A

LV PWR SUPPLY

SYSTEM CONTROL

PWR SUPPLY

LOW PASS

NV30/NV40 Operations and Maintenance Manual

Issue 3.3 2014-12-10 Page 1-10

Figure 1.3: NVE300 Exciter Block Diagram

DAC

ADC

I/O

ADC

SUPPLY

PILOT/MPX SAMPLE

REMOTE INTERFACE

CONSOLE

COMPOSITE SCA

MPX

L/R

SCA GENERATOR

2 x AES/EBU

TOSLINK OPTICAL

EXTERNAL 10MHz REFERENCE

FPGA

TCXO OR

OCXO

EXCITER PWB

RF DAC

PLL & VCSO

FILTER & PREAMP

BIAS

DAC

BIAS

POWER

VSWR

PROTECTION

FILTER

(OPTIONAL)

RF OUT

B2060001 VA

AC/DC

DSP

LINEAR

REGULATOR

PROBES

HARMONIC

SUPPLY

RS232

RF SAMPLE (-30dBc)

TEMP SENSE

POWER AMPLIFIER

85-264VAC

DC/DC

REGULATED

ASRC

NV30/NV40 Operations and Maintenance Manual

Issue 3.3 2014-12-10 Page 1-11

Figure 1.4: RF Power Module Block Diagram

FWD FWD

4-WAY

PWR PWR

4-WAY

SPLITTER

4-WAY

COMBINER

FWD PWR

OUTPUT

B2060005 VB

IPA

4-WAY

SPLITTER

COMBINER

PWR SUPPLY 1

IPA PWR SUPPLY

PWR SUPPLY 2

RF DRIVE

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Section 2: Operating the transmitter

This section provides information about operating the NV30/NV40 transmitter:

• Using the AUI - see page 2-2

• Home page - see page 2-14

• Menu page - describing transmitter operations - see page 2-15

• Logs page - viewing transmitter log - see page 2-16

• Viewing tool menu panels - see page 2-25

• Viewing real-time meters - see page 2-40

• Presets - editing operational settings - see page 2-44

• Viewing transmitter status - see page 2-59

• Factory Settings - see page 2-61

• System Settings - see page 2-70

• User accounts - see page 2-79

• Changeover page - see page 2-83

• User settings - see page 2-84

• Remote I/O page - see page 2-104

Issue 3.3 2014-12-10 Page 2-1

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Using the AUI

The NV30/NV40 has an advanced user interface (AUI) that is displayed on a 17-inch, colour LCD screen mounted on the front of the control cabinet (Figure 2.1). The AUI is controlled via touch screen that you can also access using a PC and a web browser.

This section includes the following topics:

• Logging into the AUI on page 2-3

• Describing the AUI layout on page 2-9

• List of AUI pages on page 2-10

• Navigating from page to page on page 2-13

Figure 2.1: NV30/NV40 AUI

Page 2-2 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Information is displayed in a series of pages (screens) that serve specific transmitter functions. The AUI has the following configurable displays:

• Login Page (see Logging into the AUI on page 2-3)

• Events logs (see Logs page - viewing transmitter log on page 2-16)

• Instrumentation panels (Viewing instrument panels on page 2-27)

• Real-time meters (see Meters Page on page 2-40)

• Presets (see Presets - editing operational settings on page 2-44)

• Transmitter status (see Viewing transmitter status on page 2-59)

• Factory settings (see Factory Settings on page 2-61)

• System settings (see System Settings on page 2-70)

• User accounts (see User accounts on page 2-79)

• Changeover (see Changeover page on page 2-83)

• User settings (see User settings on page 2-84)

• Remote input/output configuration (see Remote I/O page on page 2-104)

See the complete AUI flow diagram illustrated in Figure 2.2 on page 2-5.

Logging into the AUI

The transmitter’s AUI provides a means to restrict local and remote access to transmitter control functions to authorized users only. Users can create accounts that can be pre-defined to set access restriction from view-only (no control), full control (all permissions), custom (select permissions) and administrative control.

Remote access

To access the transmitter’s AUI remotely, perform the following steps:

1. Configure your network settings (see Setting up the network on page 2-85).

Issue 3.3 2014-12-10 Page 2-3

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

2. On your router or firewall software, open ports 3501 (3501 is factory default, use corresponding other port if changed) and 80 and close (restrict access to) all other ports. If you are using RDS data, open port 7005. If you are using SNMP, open ports 161 (Agent) or 162 (Traps).

3. When properly configured as noted above, the login menu (see Figure 2.3 on page 2-9) will appear in your web browser when IP address is accessed. Your IP address and any login messages appear in a box at the top, beside the logo, and the current AUI software version number appears along the bottom of the login window.

4. Log in to the AUI by entering the appropriate parameters in the login window.

• In the Language field, press the down-arrow to review a drop-down menu displaying the

available language options, and select one.

• In the User field, enter the username. Default is “Nautel”.

• In the Password field, enter the password. Default is blank.

Note:

The Nautel AUI is factory configured with a default login username and password. Nautel recommends that you change the password to improve overall system security. See Changing the

password on page 2-81.

• Press Submit to accept your login parameters and display the AUI home page (Figure 2.6 on

page 2-14). Note: The opening screen (the Home page) will have the layout from the previ-

ous login session.

Note:

If you do not have a user account, it must be set up by an existing user with proper permissions. See Adding an account on page 2-80.

Note:

If no login attempt is made after 60 seconds, a timeout feature will be activated and the web browser will be need to be refreshed in order to attempt another login.

Page 2-4 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Local access

When properly configured, (but without auto login selected) the login menu will appear on the transmitter 17-inch LCD touchscreen. Log into the AUI by entering the appropriate parameters in the login window.

• In the

Language

field, press the down-arrow to review a drop-down menu displaying the

available language options, and select one.

• In the User field, enter the username. Default is “Nautel”.

• In the Password field, enter the password. Default is blank.

• Press Submit to accept your login parameters and display the AUI home page (Figure 2.6 on

page 2-14). Note: The opening screen (the Home page) will have the layout from the previ-

ous login session.

• If auto login is set the AUI will appear automatically without the required previous steps (see

Setting auto login (local only) status on page 2-81).

Issue 3.3 2014-12-10 Page 2-5

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Page 2-6 Issue 3.3 2014-12-10

Issue 3.3 2014-12-10 Page 2-7 (Page 2-8 Blank)

Figure 2-2: NV Transmitter AUI Flow Diagram

Digital Outputs page 2-107

page 2-15

(Return to)

Home

page 2-13

HOME

page 2-14

Presets

page 2-44

Factory

Settings

page 2-61

System Configuration page 2-62

Transmitter Type page 2-63

Scaling page 2-64

System

Settings

page 2-70

Changeover

Page

page 2-83

User Accounts

page 2-79

Changing The Password page 2-81

Setting Autologin page 2-81

Changing Permissions page 2-81

User

Settings

page 2-84

Network Setup page 85

Notifications page 2-90

SNMP Configuration page 2-94

Upgrade Software page 2-72

Remote I/O

page 2-104

Digital Inputs page 2-105

Status

(same as Menu -

Transmitter Status)

page 2-59

Logs

page 2-16

Exciter TCXO page 2-73

Audio Input Calibration page 2-75

Turn On Delay page 2-76

Defaults page 2-76

External 10MHz page 2-97

FM Polarity page 2-78

Thresholds page 2-65

Redundant Supplies page 2-66

IPA Bias Balance page 2-67

PA Field Bias page 2-69

Reset page 2-71

IBOC Settings page 2-73

Digital Audio Inputs page 2-98

Time Setup page 2-100

NTP Servers page 2-101

Audio Low Thresholds page 2-102

Setting Call Sign/ID page 2-103

Email Configuration page 2-88

Exgine Settings page 2-91

Critical Parameters page 2-96

Spectrum Mask page 2-99

General page 2-47

Main Audio page 2-50

SCA page 2-52 RDS page 2-53

Other Settings page 2-56

Editing An Existing Account page 2-80

Adding An Account page 2-80

Set User Type/Permissions page 2-80

Removing An Account page 2-82

Analog Outputs page 2-109

Nautel Phone Home page 2-93

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

IP address and login messages

AUI software version

Figure 2.3: Remote AUI Login Menu

Describing the AUI layout

The AUI begins with the Home page and all further navigation will start from this screen (see Figure 2.4 on page 2-11).

Any user can view the AUI pages on the front panel of the transmitter, regardless of the login status; however, only users with the appropriate permission level can access functions that alter the transmitter control settings.

Users can access the login menu by pressing the Change User button located in the bottom banner of the AUI when logged in locally. It should be noted that this same button is shown as viewing the AUI remotely (see Figure 2.4 on page 2-11).

Log Out if

Issue 3.3 2014-12-10 Page 2-9

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

List of AUI pages

Table 2.1 defines the available AUI pages.

Table 2.1: AUI Pages AUI Page Function See Page

Home View meters, tool menu panels, choose options and

navigate to other pages. Menu Choose options and navigate to other pages. page 2-15 Transmitter Log View transmitter event history. page 2-16 Tool Menu Choose tool menu panel options. page 2-25 Meters List View Choose meters for display. page 2-40 Presets Edit user-defined presets. page 2-44 Transmitter Status View transmitter’s current active faults and

operational status. Factory Settings View critical transmitter parameters. page 2-61 System Settings Users determine critical system configuration

parameters. User Accounts Set user permission rights and define user account

information.

page 2-14

page 2-59

page 2-70

page 2-79

Changeover Set main exciter and auto exciter changeover

function. User Settings

Remote I/O Define remote digital inputs/outputs and configure

Set network information, configure email and alarm

notification parameters, configure Exgine interface

information, configure SNMP information, capture

critical parameters, set time and date, enable/

configure NTP servers and set call sign/ID.

analog outputs.

Each AUI page provides information about a specific transmitter function. All navigation through the AUI pages begins on the main screen shown in Figure 2.4 on page 2-11.

Page 2-10 Issue 3.3 2014-12-10

page 2-83

page 2-84

page 2-104

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

RF On

Forward

Date &

Time

Modulation Level

RF Off

Status

Local/

Top

Banner

Bottom

Banner

Events

Remote

Reset

Tool Menu

Panel

Displays (up

to 4 on

screen or

one full screen)

Log

Power

Mode, Frequency

Set Point, Reflected

Selected Meters

Active Exciter

Power

Active/Select

Activity Window

Log Out / Change User

Preset

AUI

Reload

Figure 2.4: Using the AUI

The top banner is permanent on all AUI pages and includes:

• Nautel Logo: From any AUI page, press the displayed logo to reload the AUI and prompt

for a login. Press this if your local AUI stops responding.

• Date & Time: Displays the date (including day of the week, month, day and year) and current

time (see Time setup on page 2-100).

Transmitter: Displays the name of the active preset, current forward power (and power set

• point based on the active preset) and reflected power levels as well as the operating mode (FM, FM+HD, HD, etc.) and carrier frequency. (see Presets - editing operational settings on

page 2-44). Press Menu/Presets (bottom panel) to open the Presets page and edit this

information. Also the call Sign/ID is displayed here (see Setting call sign/ID on page 2-103).

• Preset: Displays the active preset. Press this area to open the Activate Preset menu and

select the active preset.

• Exciter: Displays the active exciter and the peak (red) FM modulation value. Press in the Active Exciter field to shortcut to the

Changeover page. The active exciter is displayed in the

top, right corner (see Figure 2.4).

Issue 3.3 2014-12-10 Page 2-11

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

• Forward Power: Displays the analog power output when in FM or FM +HD modes and displays the HD power output when in HD (only) mode.

The bottom banner is also permanent on all AUI pages and includes the following buttons, some of which open other menus and displays:

• RF On: Press to enable the transmitter’s RF power stage. When the button is highlighted green, RF is enabled (on). When the button is highlighted amber, a fault condition exists that is preventing the RF power stage from turning on.

• RF Off: Press to disable the transmitter’s RF power stage. When button is highlighted in red, RF is disabled (off).

Activity Window: Displays various messages to reflect specific user interface commands,

• such as RF on/off, local/remote control, or reset.

•

Menu: Press to open the Menu page, which allows navigation to various other pages (see

Menu page - describing transmitter operations on page 2-15).

• Status: Press to open the Transmitter Status page (see Viewing transmitter status on

page 2-59), which provides current alarm and status details for the transmitter. When the

Status button is red, one or more alarms of “high” severity is currently being reported and

the transmitter is in an ‘off-air’ state. When the Status button is amber, “medium” or yellow “low” one or more lower level alarms is currently being reported, but the transmitter is still ‘on-air’, possibly at reduced power. When the Status button is green, the transmitter is operating normally. In this case there are no alarms being reported.

• Logs: Press to shortcut to the Transmitter Log page, which displays historical alarm and sta- tus records for the transmitter (see Logs page - viewing transmitter log on page 2-16).

Local/Remote: Displays the operational control status of the transmitter. From the touch

• screen, press the desired button. If

Local is highlighted green, only local control of the AUI is

possible. If Remote is highlighted green, only remote control is possible (however local users can still navigate through the menus and disable the RF output by pressing RF Off).

• Reset: Press to reset protection circuits and restore any RF power modules (and associated power supplies) that were inhibited, but are now alarm-free.

• Change User/Log Out: Press to display a login menu. Enter your username and password, then press Done. If you do not have a user account, see Factory Settings on page 2-61.

Change User button will display as Log Out while viewing AUI remotely.

Page 2-12 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Press this button to exit all menu pages.

The displays between the top and bottom menus, contains user selected pages. These pages provide access to a variety of AUI functions such as transmitter status and hardware settings. The following paragraphs describe how to use these pages.

Tool Menu: Display up to four panels on the screen at one time. To reveal the Tool M enu

• options, press X in the upper right corner of one panel to close an existing panel, and then press in the blank space to display a menu of panels (see Viewing tool menu panels on

page 2-25).

•

Meters: Displays the real-time meters that provide a system review of the transmitter

(see Viewing real-time meters on page 2-40).

Navigating from page to page

You can easily navigate through the AUI from its Home page (see Figure 2.6 on page 2-14) or Menu page (see Figure 2.7 on page 2-15). During navigation, all Menu pages will feature a red exit page

button(see Figure 2.5). Press this button to exit the Menu page you are on and return to the Home page.

Figure 2.5: Exit Page Button

Issue 3.3 2014-12-10 Page 2-13

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Home page

The Home page is the first screen to appear when you login into the AUI. You can return to the

Home page, from any screen, by pressing on the logo (upper left corner) or by pressing

Home

Figure 2.6: Home Page

Menu >

Press the Menu button to view the various sub-menu options (see Figure 2.7 on page 2-15).

Page 2-14 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Menu page - describing transmitter operations

From the Home page, press the Menu button to view the Menu page (see Figure 2.7). The Menu page displays icons that link to pages that control various transmitter operations.

Figure 2.7: Menu Page

Select Home to return to the home page (see Figure 2.6 on page 2-14).

Choose Presets to open screens related to presets (see Editing or creating presets on page 2-45).

Select Factory Settings to view various parameters relating to the transmitter (see Factory Settings

on page 2-61).

Press System Settings to access pages that allow users to reboot the AUI or active exciter, perform software upgrades, configure IBOC Settings, set Audio Input Calibration, configure FM Polarity etc. (see System Settings on page 2-70).

Issue 3.3 2014-12-10 Page 2-15

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Press User Accounts to access a page that displays a list of users with access to the AUI and, depending on permission level, allows editing of user accounts (see User accounts on page 2-79).

Select Changeover to access a page that allows setting of the main (active) exciter and setup of automatic exciter changeover (see Changeover page on page 2-83).

Press User Settings to access a page that allows network configuration, email configuration and alarm notifications, setting of Exgine parameters, SNMP configuration, capturing critical parameters, setting date and time, enabling and configuration of NTP servers and setting call sign (see User

settings on page 2-84).

Press Remote I/O to access a page that allows assignation of remote digital inputs and outputs as well as the configuration of analog outputs (see Remote I/O page on page 2-104).

Logs page - viewing transmitter log

The Logs page allows you to review the transmitter’s event logs to check the operational status, historical alarms, perform troubleshooting, or identify recent changes to transmitter controls. Press

Logs (located on bottom panel) on any AUI window to open this page (see Figure 2.8 on page 2-17).

This section includes the following topics:

• Viewing event logs on page 2-17

• Understanding the log manager window on page 2-19

• Filtering logs on page 2-20

• Copying logs on page 2-21

• Deleting logs on page 2-21

• Viewing the legend on page 2-24

Page 2-16 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Page number of displayed page

Navigate through the table using these arrows

first page

last page

page-by-page

row-by-row

page-by-page row-by-row

Figure 2.8: Log page

Viewing event logs

The Logs page displays a “read only” chronological table of log events under the following column headings (see Figure 2.8):

• Device - identifies the origin device of the alarm (e.g., Controller, Exciter, or RF Module).

Event - identifies the alarm name.

•

State - indicates whether the alarm state is active (red bell) or cleared (green checkmark) and

in some cases, indicates whether the RF was turned on or off. This column will also display which control state (Local or Remote) the transmitter is in, which preset index was selected, the frequency that is set and the power level.

• Severity - indicates how seriously the alarm affects transmitter operation.

Issue 3.3 2014-12-10 Page 2-17

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

= low (RF output not affected)

= medium (RF output may be reduced)

= high (RF output may be inhibited)

Figure 2.9: Alarm Severity

• Time of Event - identifies the day-of-the-week, date and time of the alarm event.

To navigate through the table, press the arrow keys on the right-side of the screen or use the scroll bar that appears when more than one page is available.

The table of log information can span over more than one page. The current page number is identified above the table on the right-side of the screen. For example, displayed page is one out of a possible four pages. Press the

Page button to reveal information about

Page 1/4 means that the

the pages.

You can access a more detailed listing of events and resolve any alarm issues via the Log Manager window. Pressing the Log Manager button on the Logs page will provide access to this window (see

Figure 2.9 on page 2-19).

Page 2-18 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Tabs

Device type Selection

Methods

Calendar and Clock

Understanding the log manager window

The Log Manager window contains the functions that edit the logs listed in the Logs page. Press the

Log Manager button to open a configurable window with the following display options identified by

tabs across the top of the screen (see Figure 2.9):

• Filter Logs: Press to determine filter parameters by date and frequency.

• Copy Logs: Press to copy the selected logs (remote view only).

• Delete: Press to remove all selected logged events.

Statistics: Press to display detailed information about an event(s).

•

Legend: The Legend tab opens a “read only” display of alarm symbols to help you interpret

the ones listed in the Logs page or in the Statistics window (see Figure 2.14 on page 2-24).

Each of these tabs, opens a secondary window or changes the active window options to suit the tab function.

Figure 2.9: Log Manager Window

Issue 3.3 2014-12-10 Page 2-19

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

By Date Range

Controller

Exciter A Exciter B

RF Module #

Filtering logs

You can filter transmitter events based on their device or date by clicking the Filter Logs button in the

Log Manager (see Figure 2.10).

Select a Device by pressing the Select a Device button to reveal the following event monitoring op-

tions in a drop-down menu:

– No Selection - displays all transmitter events (shown as Select a Device)

– Controller - displays controller events only

– Exciter A - displays exciter A events only – Exciter B - displays exciter B events only

RF Module # - displays applicable RF Module # events only

–

Activate a log mode option by selecting the radio button besides it:

–

Get Next Batch - allows users to see log events in batches of 2000

– Filter by Date - activates the calendar portion of the screen and allows users to select a

date range

– Select All - selects all logs for display

Press OK to accept the configuration or press Cancel to close and return to Transm itter Log.

Figure 2.10: Log Manager - Filtering Logs

Page 2-20 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Copying logs

You can create a copy of all the logs in the selected list while remotely logged into AUI (these are copied to the remote user’s computer clipboard) by clicking on the Copy Logs button in the log manager (see Figure 2.11). You can paste the tab-delimited text copy of the logs into a text editing program such as Word, Excel, Notepad, etc. Press OK or Cancel to close and return to the

Transmitter Log.

Figure 2.11: Log Manager - Copying Logs

Deleting logs

You can delete all events or a selection of events by clicking on the Delete button in the log manager (see Figure 2.12 on page 2-22).

Delete by date - activates the calendar and clock (24-hour clock) where users can press the arrows to

establish a date and time. Log events older than this date will be removed from the events list.

Delete All - removes all the logs in the list.

Press OK to accept the configuration or press Cancel button to close this window and return to the

Transmitter Log.

Issue 3.3 2014-12-10 Page 2-21

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Month Day Year Hours Minutes

Figure 2.12: Log Manager - Deleting Logs

Viewing log statistics

Users can view statistical information on the events being displayed by clicking on the Statistics button in the Log Manager (see Figure 2.13 on page 2-23). The Statistics screen groups similar events that occurred within the filtered period as well as the time and date of the earliest and latest event occurrence for each event type. Use the scroll bar to move through the list or the up and down arrow buttons to the right of the scroll bar (if applicable). If the event log display spans more than ten rows, use the arrows on the side of the display to scroll to page up or down. The Statistics page will look similar to the Logs page display but has additional headings (see Figure 2.13 on page 2-23):

–Device - refers to the device that is associated with the alarm i.e. Exciter, Controller, RF

Module, etc.

–Event - describes the alarm (e.g., Local/Remote switch)

–Severity - identifies the seriousness of the alarm.

–# Events - reveals the number of times the same alarm has occurred for the same device.

Page 2-22 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

–Earliest - refers to the first time of an alarm occurrence.

–Latest - refers to the last time of an alarm occurrence.

If an alarm has only one occurrence (i.e., # Events column is 1), then the time in the “Earliest” column will be the same as the time in the “Latest” column. If an alarm has more than one occurrence (e.g., # Events column is 4), then the “Earliest” column reveals the time of the first alarm (back in time), while the “Latest” column reveals the time of the last alarm (closest to the present).

Press OK or Cancel to close this window and return to the Transmitter Log.

Figure 2.13: Log Manager - Statistics

Issue 3.3 2014-12-10 Page 2-23

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Viewing the legend

The Legend tab is different from the other tabs. Press the Legend tab to display a window describing the meaning of the symbols that appear in the

Figure 2.14).

Press OK or Cancel to close this window and return to the Transmitter Log.

Figure 2.14: Log Manager - Legend

State and Severity columns of the Logs page (see

Page 2-24 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Viewing tool menu panels

The center area of the Home page screen displays up to 4 panels of instrument information. Users can choose which panels to display from 9 possible information panels (see Figure 2.15).

This section include the following topics:

• Describing instrument panel options on page 2-26

• Viewing instrument panels on page 2-27

• Instrument panel procedures on page 2-27

• Available instrument panels on page 2-30

Figure 2.15: Tool Menu Panel Options

To view the instrument panel options , close an existing panel by pressing X (upper-right corner) and then press the icon in the blank space to open the

Issue 3.3 2014-12-10 Page 2-25

Tool M e nu. Select an icon to display that panel.

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Describing instrument panel options

The following table describes instrument panel options:

Table 2.2: Tool Menu Panels Tool Description Reference

Spectrum Displays a spectrum analyzer, capable of monitoring

the transmitter’s RF output spectrum and various RF sections of the exciter. An audio spectrum analyzer is also available to allow viewing of the composite baseband.

EQ Frequency Response

EQ Impulse Response

EQ Filter Delay Displays the delay of the modulator’s EQ filter across

AM-AM Correction Displays the amplitude compensation being applied to

AM-PM Correction Displays the phase compensation being applied to the

Signal Constellation

Displays the frequency response of the modulator’s EQ filter.

Displays the impulse response of the modulator’s EQ filter.

its bandwidth.

the magnitude signal.

phase signal. Displays the phase and amplitude of the symbols

being modulated within an OFDM sub-carrier as dots on a cartesian graph. Also displays timing, MER and data carrier information.

See page 2-30

See page 2-32

See page 2-33

See page 2-34

See page 2-35

See page 2-36

See page 2-37

Lissajous Plot Displays a Lissajous figure that represents the

resultant vector (magnitude and phase) for the applicable channels (either L and R or I and Q).

Power Distribution Displays a CCDF plot that indicates the probability of

exceeding a given power level, b ased on the a ver ag e power level. Aids in determining pea k powe r capability.

Page 2-26 Issue 3.3 2014-12-10

See page 2-38

See page 2-39

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Each panel has a tool bar at the top of the display

Backward one step

Forward one step

Maximize / Minimize

Cog (more settings)

Exit

Peak (jumps cursor to the next peak)

Viewing instrument panels

Each instrument panel has a menu bar that may be different from other panels (see Figure 2.16).

Figure 2.16: Instrument Panel Menus

Instrument panel procedures

Procedure to view instrument readings on the panel:

• To display a cursor in the panel, touch the screen where you want the cursor (see Figure 2.17

on page 2-28). The cursor position is noted in the upper, right-hand corner of the panel (e.g.,

frequency and amplitude for the spectrum analyzer). Touch in other areas of the instrument to provide a coarse adjustment of the cursor position.

• To make fine adjustments, use the backward and forward buttons (see Figure 2.16).

Issue 3.3 2014-12-10 Page 2-27

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Cursor

Tools to move cursor and display information

• To enlarge/reduce the instrument panel, use the maximize/minimize buttons. Some instrument displays show more information when maximized.

– Most panels can be maximized to fill the whole screen, e.g., EQ Impulse Response (see

Figure 2.18 on page 2-29).

– Some panels display more information when maximized, e.g., Signal Constellation (see

Figure 2.19 on page 2-29).

• To display additional settings in the Spectrum Analyzer panel, touch the “cog” button (see

Figure 2.16 on page 2-27). Displays include resolution bandwidth, span, averaging rate and

the actual measurement source (transmitter output, audio analyzer, etc.) that is being displayed. Touch the “peak” button (see Figure 2.16 on page 2-27) to place the cursor on the next successive peak in the spectrum.

Figure 2.17: Instrument Cursor Manipulation

Page 2-28 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Maximize/Minimize buttons

Figure 2.18: Instrument Panel - Expansion Example 1

Figure 2.19: Instrument Panel - Expansion Example 2

Issue 3.3 2014-12-10 Page 2-29

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Peak Cog

Available instrument panels

Spectrum Analyser

See Figure 2.20. The carrier level is normalized to its unmodulated carrier level at 0 dB. The graph center is always at the carrier frequency, as defined by the active preset’s Frequency value

Masks are shown based on transmission mode and are defined by the latest versions of the following standards:

•IBOC: NRSC-5

• European Standard: ETSI EN 302 018-2

• FCC CFR 47, Part 73.317 and IC BETS-6e

Note:

While very accurate, the spectrum analyzer may display artifacts (spurs) as some operating carrier frequencies that are a function of the analyzer and are not actually present on the output of the transmitter. If these spurious emissions are observed on the spectrum analyzer, Nautel recommends that a calibrated, external spectrum analyzer be used to verify the presence of spurs.

Touch on the panel to display a cursor in the approximate area. The cursor position (frequency and amplitude) is noted in the upper, right-hand corner of the panel. Touch other areas of this instrument panel to provide a coarse adjustment of the cursor position.

Figure 2.20: Spectrum Analyzer

Page 2-30 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Use the left and right buttons to make fine adjustments.

Use the maximize or minimize buttons as required.

Use the “peak” button to place the cursor on the next successive peak (moving left to right) in the spectrum.

Use the “cog” button to gain access to spectrum settings (see Figure 2.21) such as:

• Resolution Bandwidth: determines the FFT bin size or the smallest frequency that can be resolved. Allowable range is 75 - 10,000 Hz. Default setting is 1000 Hz.

• Span: determines the start and stop frequencies of the analyzer with the carrier frequency always at the center. Allowable range is 10 - 1200 kHz. Default setting is 1000 kHz.

• Averages: determines the number of averages that the analyzer performs per sweep. Press the Clear Averaging button to restart the averaging process. Allowable range is 0 - 100 kHz. Default setting is 19.

• Measurement Source: determines the source of the spectrum plot (transmitter output, audio analyzer, etc.) that is being displayed. Selecting TX Output uses the exciter’s RF sample feedback signal to display the RF output spectrum. Selecting Internal (Post EQ) displays the signal that will be produced by the exciter. Selecting Internal (FM) uses the exciter’s RF signal, before being equalized (if applicable). Selecting MPX shows the composite baseband signal.

Figure 2.21: Spectrum Settings

Issue 3.3 2014-12-10 Page 2-31

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Equalizer screens

The NV30/NV40’s exciter includes a fixed equalizer to optimize audio performance. There are three EQ instrument panels available in the Tool Menu - EQ Frequency (see Figure 2.22), EQ Impulse

Response

(see Figure 2.23 on page 2-33) and EQ Filter Delay (see Figure 2.24 on page 2-34).

Coefficients are selected based on channel frequency. All frequencies shown are relative to the channel frequency.

Figure 2.22: EQ Frequency Response

EQ frequency response

See Figure 2.22. This panel displays the frequency response of the active exciter’s EQ filter. The panel displays the gain of the filter with respect to the magnitude and frequency of the modulating signal. A dashed line is displayed at the 0 dB level.

This tool is useful for installations featuring filter coefficients loaded to compensate for a channel combiner response.

Touch on the panel to display a cursor in the approximate area. The cursor position (magnitude and amplitude) is noted in the upper, right-hand corner of the panel. Touch in other areas of this instrument panel to provide a coarse adjustment of the cursor position.

Use the left and right buttons as fine adjustments. Use the maximize or minimize buttons as required.

Page 2-32 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.23: EQ Impulse Response

EQ impulse response

See Figure 2.23. This panel displays the impulse response of the modulator’s EQ filter in the time domain. This is a static display tool so the screen image is not fluid and will not change.

Touch on the panel to display a cursor in the approximate area. The cursor position (magnitude and time) is noted in the upper, right-hand corner of the panel. Touch in other areas of this instrument panel to provide a coarse adjustment of the cursor position.

Use the left and right buttons as fine adjustments.

Use the maximize or minimize buttons as required.

Issue 3.3 2014-12-10 Page 2-33

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.24: EQ Filter Delay

EQ filter delay

See Figure 2.24. This panel displays the delay of the modulator’s EQ filter across its bandwidth.

Touch on the panel to display a cursor in the approximate area. The cursor position (delay and frequency) is noted in the upper, right-hand corner of the panel. Touch in other areas of this instrument panel to provide a coarse adjustment of the cursor position.

Use the left and right buttons as fine adjustments.

Use the maximize or minimize buttons as required.

Page 2-34 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

AM-AM and AM-PM correction screens

When the transmitter is operating with digital carriers, the exciter linearizes the transmitter’s RF drive signal by performing adaptive pre-correction. There are two correction parameters - AM-AM

Correction

(see Figure 2.25) and AM-PM Correction (see Figure 2.26 on page 2-36), which can be

viewed as an instrument panel.

Figure 2.25: AM-AM Correction

AM-AM correction

This panel displays the amplitude correction being applied to the RF drive signal in order to compensate for the transmitter amplitude (gain) response, which is non-linear. The x-axis represents the signal amplitude and the y-axis represents the gain correction applied for a given amplitude value. A look up table (LUT) index value of 0 represents low transmitter output power (RF drive). A LUT index value of 255 represents the maximum transmitter output power (RF drive).

The LUT curve can show that at low transmitter output power, more RF drive power is required to connect for low final stage amplifier gain - the curve sharply increases as it drops to 0 table value. (This low gain can also be overcome using additional bias, however pre-correction is more efficient.) Equally, the curve could also increase sharply at the top end of the table, suggesting that high RF drive power (gain) is required to connect for low gain at final stage amplifiers (PA compression peak limiting). It is technically the inverse of the transmitter’s power amplifier gain response.

Touch on the panel to display a cursor in the approximate area. The cursor position (Gain and LUT index) is noted in the upper, right-hand corner of the panel. Touch in other areas of this instrument panel to provide a coarse adjustment of the cursor position. Use the left/right fine adjustment buttons and the maximize/minimize buttons as required.

Issue 3.3 2014-12-10 Page 2-35

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.26: AM-PM Correction

AM-PM correction

This panel displays the phase correction being applied to the RF drive signal in order to compensate for the transmitter’s (IPA +PA stage) phase non-linearity versus the output power. For example, in

Figure 2.26 the transmitter output power is low, so the curve in the plot shows positive phase

correction. Inversely, a negative phase correction will be displayed in the plot given high output power levels. This correction is represented on the plot via the x-axis (table index value of between 0-

255). The y-axis represents the phase shift correction applied for a given amplitude value.

Touch on the panel to display a cursor in the approximate area. The cursor position (phase and LUT index) is noted in the upper, right-hand corner of the panel. Touch in other areas of this instrument panel to provide a coarse adjustment of the cursor position.

Use the left and right buttons as fine adjustments.

Use the maximize or minimize buttons as required.

Page 2-36 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.27: Signal Constellation

Signal constellation

See Figure 2.27. The exciter constantly measures the transmitter signal and performs basic demodulation of the digital carriers. The Signal Constellation panel displays the phase and amplitude of the symbols being modulated within an OFDM sub-carrier as dots on a cartesian graph. There are separate screens for each sub-carrier. Typically, the dots will be grouped together around the ideal data points. When the transmitter is on, the signal constellation display is representative of the transmitter output. When the transmitter is off, the display is representative of the forward path that will be transmitted.

Sub-carrier group information is shown in the lower, right section of the screen. Displayed information includes the sub-carrier group name, the bandwidth that the selected carrier group occupies and the modulation error ratio (MER) for the selected carrier group. MER quantifies the performance of the transmitted digital signal as the ratio between the RMS power of the ideal signal and the RMS power of the received signal’s error vector. A higher MER value is characteristic of a

smaller error, and therefore a higher quality signal. There is a NRSC minimum requirement of a MER value of no less than 14 dB.

Use the scroll bar to select a higher or lower sub-carrier for viewing. Some sub-carriers are for timing and synchronization. Others are modulated with data/content. Use the maximize or minimize buttons as required.

Issue 3.3 2014-12-10 Page 2-37

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

L and R mode

I and Q mode

Figure 2.28: Lissajous Plot

Lissajous plot

See Figure 2.28. This panel displays a Lissajous figure that represents either L (left) and R (right) audio content or a representation of the FM modulated signal [I (in-phase) and Q (quadrature)]. I and Q will be automatically selected unless the transmitter is operating in stereo mode or not operating in IBOC. Left and right audio content is displayed for all other audio sources.

The plot consists of a group of sequential samples to allow signal analysis. In L and R mode, the L+R portion of the signal tends to dominate the plot, resulting in the majority of samples appearing in the lower, left and upper, right quadrants. In I and Q mode, signals that are of equal frequency and 90 degrees out-of-phase result in a circular display.

Use the maximize or minimize buttons as required..

Page 2-38 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.29: Power Distribution Plot

Power distribution plot

See Figure 2.29. The exciter measures the relative power levels of the signal and determines the probability of exceeding a given power level, relative to the average power. The data is plotted in the

Power Distribution Plot as a CCDF (complementary cumulative distribution function). The x-axis

displays the relative power level in dB, with the reference representing the average power. The average power is 0db. The y-axis displays the probability of exceeding that power level. This plot can be used to assess the distribution of a given signal, and provides an indication of the amount of peak power capability required from the transmitter in order to prevent peak clipping/distortion of the output signal.

Touch on the panel to display a cursor in the approximate area. The cursor position (power gain and probability index) is noted in the upper, right-hand corner of the panel. Touch in other areas of this instrument panel to provide a coarse adjustment of the cursor position.

Use the left and right buttons as fine adjustments.

Use the maximize or minimize buttons as required.

Issue 3.3 2014-12-10 Page 2-39

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

HOME PAGE

Information

Selected Meters

Buttons

View

Save

Arrow

Viewing real-time meters

The AUI can be used to display metered parameters on the Home page (see Figure 2.30), if selected individually from the

This section includes the following topics:

• Describing the meter display on page 2-40

• Accessing meter information on page 2-41

• Identifying meter information on a specific sub-device on page 2-42

• Saving a meter list on page 2-43

Figure 2.30: Meters Page

Meters List View page or saved in a meter list layout and set to default.

Describing the meter display

The meters displayed in the AUI represent the active meters selected for display. Each meter is a colour-coded bar with minimum and maximum values (see Figure 2.30). The current value for a meter is indicated by an arrow on the colour-coded bar, as well as a numeric value below the meter.

• A parameter value in the green section of a meter bar indicates the parameter is within the range for normal operation.

Page 2-40 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Information

to close/delete

Buttons (displays full set of meters for specific sub-device)

Scroll Bar

• A parameter value in the yellow section (as applicable) of a meter bar indicates the parameter is still within an operational range, but is approaching design limitations.

• A parameter value in the red section of a meter bar indicates the parameter is outside normal operating conditions.

Accessing meter information

Procedures for accessing and editing information in the Meters section of the AUI screen:

• To delete a meter from the Home page, press X in the Meters window (Figure 2.31).

• To review all the meter options, press the meter list view shortcut glass) at the top of the meters panel (see Figure 2.31). This will open the window.

•On the Meter List View screen users can see all relevant meters of a sub-device. Select the sub-device in question under the Transmitter Layout column and the Relevant

Meters

column will be populated. The desired Meters can now be selected.

Figure 2.31: Meters List View Window (Exciter A shown)

button (magnifying

Meter List View

Issue 3.3 2014-12-10 Page 2-41

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Identifying meter information on a specific sub-device

1. Open the Meters List View window and select one of the desired transmitter sub-devices.

– Controller

– Exciter A

– Exciter B

– RF Modules - Multiple modules supported

2. Under Transmitter Layout, press the information button (i) beside a device type. This will open

an information window in tabular format (see Figure 2.32).

Note:

When a meter value is updated, a blue box briefly appears around that value. Typically, updates occur every one or two seconds.

3. To choose individual meters for display in the Meters window of the Home page: Select the device type name in the Transmitter Layout panel and select the checkbox next to the desired meters shown in the Relevant Meters panel (see Figure 2.31 on page 2-41). If the Relevant

Meters

the desired meter.

panel contains more than one page of information, use the scroll bar (right-side) to find

Figure 2.32: Meters - Information (Device type Controller shown)

Page 2-42 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Saving a meter list

Note:

Meter lists are associated with user accounts. Lists saved in this screen are only displayed in the current user account. Setting a list as default will define the meters that will appear when logging into the current account (or after an ac power interruption in the local AUI if this is the default user account).

To save meter specifics for display on the Home page:

Open the Meter List Save window from the Home page using the floppy disk button (Figure 2.33).

• Press Save As to save the currently displayed meters. Enter a name in the Layout Name

entry box and press OK.

• Press Delete to discard the selected meter list.

• Press Set Default to set the selected meter list as the default for the current user

account. The * symbol shows the default.

• Press Save to overwrite the selected meter list with the currently displayed meters.

• Press Load to display the meters saved under the currently selected meter list in the

Meters panel on the right-hand side of the Home page.

Figure 2.33: Meter List Save Window

Issue 3.3 2014-12-10 Page 2-43

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Active Preset

Access from the Menu page

Presets - editing operational settings

The Presets page (see Figure 2.34) allows users with the appropriate permissions to view operational data (power level, frequency, mode, program input characteristics), plus create and control preset settings. Users can create up to 62 presets or edit existing presets. To view the

Presets in the Menu page.

This section includes the following topics:

• Editing or creating presets on page 2-45

• Loading presets on page 2-46

• Understanding the preset tabs on page 2-47

Figure 2.34: Presets Page - General Tab

Presets page, select

Note:

When asked to enter a value in a field, an error message may appear (red text at the bottom of the screen) showing the limits of the requested value. Re-enter the desired value, ensuring it falls within the limits shown.

For example: Output Power - Valid values: 0.15kW to 5.5kW

Page 2-44 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Editing or creating presets

When a presets page is opened from the menu, (for example see Figure 2.34 on page 2-44 or

Figure 2.37 on page 2-52), the

current operational state of the transmitter. activated by pressing the Save button.

To edit a saved preset, you must load that preset from the Presets page (see Loading presets on

page 2-46). If the edited preset was active before it was edited, saving the preset will update the

preset, but the Current Settings will not change. To update the operation of the transmitter, reactivate the preset through the top banner (see Activating presets on page 2-46).

In the top banner (see Activating presets on page 2-46), an asterisk (*) appears next to the preset name when the Current Settings have changed since the last preset was loaded. Current Settings are not saved through an ac power cycle; when the transmitter recovers from an ac power loss, it loads the preset that was last activated.

On the Presets page, an asterisk (*) appears next to the preset name in the header when there are unsaved changes to the preset.

Current Settings of the transmitter are displayed. They define the

Current Settings can be edited and then immediately

When changes are complete, press the Save button and then press the Save Preset window’s Save button to enable the changes. If you are creating a new preset, you can also enter a new name (e.g., Preset 4 - IBOC) in the preset window before clicking the Save or Save New button.

Parameters that can be edited are discussed in detail in Understanding the preset tabs on page 2-47.

To remove a preset, select it and press the Delete button.

To ignore any changes, press Cancel to return to the Presets page.

Note:

If you change an FM+HD or HD preset, particularly its power level or frequency, it is possible to optimize the transmitter’s performance by adjusting the HD PA Volts value in the Mode section of the Presets screen. For additional information see Improving transmitter performance for

IBOC presets on page 4-12 of this manual.

Issue 3.3 2014-12-10 Page 2-45

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

CLICK HERE TO DISPLAY PRESET SELECTION OPTIONS

Loading presets

When first entering the Presets page, the current “active” preset is displayed (see Figure 2.34 on page

2-44). If the current preset is not the desired one, use the

call up a window containing a list of available presets.

Load button on the left-side of the AUI to

Select the desired preset and press the

Delete button to delete the selected preset. Users cannot delete the current "active" (operational)

Load button to view or enable editing of the preset. Press the

preset or any preset that is referenced in the Remote I/O menu as either a remote input or output. Those links in the Remote I/O menu must be deleted before the associated preset can be deleted. Press Cancel to return to the Presets page.

Activating presets

In the Transmitter block in the AUI’s top banner, press the bar that contains the active preset name and the drop-down arrow (see Figure 2.35). The Activate Preset window will appear, which contains a list of all preset options. Press and highlight the desired preset and press the Activate button to enable the preset as the transmitter’s active preset. Press the Cancel button to close this window.

Figure 2.35: Activating Presets

Page 2-46 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Understanding the preset tabs

The Presets page consists of tabs across the top with functions on the left-side and parameters displayed in the center and right-side of the window. A separate display appears for each of the following tabs:

General - (see Figure 2.34 on page 2-44)

• Preset Name This field identifies the current preset settings. Users must load a preset to

directly edit this field (see Activating Presets on page 2-46).

• Output Power Set the output power level (in kW). Output power limits are a function of

the transmitter mode of operation (see Table 1-1 of the Pre-Installation Manual for RF output power ratings for this transmitter).

• Frequency Set value. Valid frequencies are between 87.00 and 108.00 MHz.

• Mode Set the overall transmission mode. Available options are:

– FM: an analogue only mode, transmits a carrier, frequency modulated

with audio.

– HD: all digital mode; this mode transmits the upper and lower digital

sidebands of OFDM IBOC carriers. HD transmitter is typically high-level combined (coupler or spatial) with a paired FM only transmitter. See page

2-48 for additional calibration settings. This mode requires additional

hardware.

– FM+HD: also known as hybrid/simulcast or low-level combined, this

mode transmits the analog carrier (FM modulated) and the upper and lower digital sidebands of OFDM IBOC carriers. See page 2-48 for additional calibration settings. This mode requires additional hardware.

– DRM+: transmits a DRM OFDM signal using the I/Q stream from a

DRM modulator connected to the desired AES input. See page 2-48 for additional calibration settings. This mode requires additional hardware.

Note: Settings on the Presets tabs are shown/hidden based on the chosen settings. Not all settings are available in all modes.

Issue 3.3 2014-12-10 Page 2-47

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Mode - additional calibration settings:

– IBOC Injection (Lower): for FM+HD and HD modes, enter value, in dB,

between -20 and -10 dB for the IBOC injection level of the lower sideband of digital carriers. This value determines the relationship between the digital carriers power and the analog carrier power. Example: -20 dB indicates that the total RMS power of the digital carriers will be 1/100 of the total RMS power of the analog carrier. -10 dB indicates that the total RMS power of the digital carriers will be 1/10 of the total RMS power of the analog carrier.

– IBOC Injection (Upper): for FM+HD and HD modes, enter value, in dB,

Note:

The actual digital sideband power is 3dB less than that indicated in the upper or lower IBOC Injection fields; i.e. if -20dBc is entered in the upper and lower IBOC Injection fields, the upper and lower digital sideband power levels are actually -23dBc; this way, when added, the resultant total digital power level is -20dBc.

For symmetrical sideband transmission: if -14dBc IBOC Injection level is desired (total digital

power of upper + lower sidebands is 4% of analog carrier power), set the upper and lower IBOC Injection levels to -14dBc.

For asymmetrical sideband transmission, account for the fact that the actual sideband power level

is 3dB less than that shown. For example, if the upper digital sideband IBOC Injection level is entered as -14dBc, the actual power level will be -17dBc. This is equally true for the lower digital sideband.

–HD PA Volts: for FM+HD, HD and DRM+ modes, enter value, in volts,

between 25.0 V and 53.0 V. This value sets the drain voltage applied to the PAs in the RF power modules, from their associated power supplies. value affects

IBOC/DRM+ performance. Larger values result in an

improved spectrum, but decreased efficiency. Conversely, smaller values result in improved efficiency, but degrade the spectrum. Typical values are between 35 V and 50 V, and depend on many variables such as power level, frequency and injection level.

This

Page 2-48 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Note:

For additional information on operating FM+HD, HD and DRM+ presets, please refer to Improving Transmitter Performance for IBOC Presets in Section 4 of this manual.

–HD IPA Volts: for FM+HD, HD and DRM+, enter value, in volts, between

25.0 V and 53.0 V. This value sets the drain voltage applied to the IPA in the RF power modules, from their associated power supplies. This value affects IBOC/DRM+ performance. Larger values result in an improved spectrum, but decreased efficiency. Conversely, smaller values result in improved efficiency, but degrade the spectrum. The default value is 50 V and typically does not change.

– HD Power Boost: for FM+HD mode only. Enable this setting to engage

Nautel’s digital PowerBoost process, an advanced peak-to-average power ratio reduction that increases hybrid-mode transmitter efficiency and power capability. HD PowerBoost is only available in transmitters with the appropriate exciter configuration.

Issue 3.3 2014-12-10 Page 2-49

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.36: Presets - Main Audio

Main Audio - (see Figure 2.36)

• Audio Source Connects the appropriate exciter input for use. Available options are:

– Left/Right/Mono: this source allows for further configuration via

Analog Level, Audio Mode (Mono L+R, Mono L, Mono R, Stereo), 15kHz Lowpass, Preemphasis, Main Audio Gain Adjust

settings. See page 2-51

for additional configuration information.

–MPX: this source allows for further configuration via the MPX Level

setting. See page 2-51 for additional configuration information.

–Primary Digital: this source allows for further configuration via Digital

Level, Audio Mode (Mono L+R, Mono L, Mono R, Stereo), 15kHz Lowpass, Preemphasis, Main Audio Gain Adjust

settings. See page 2-51

for additional configuration information.

–Secondary Digital: this source allows for further configuration via

Digital Level, Audio Mode (Mono L+R, Mono L, Mono R, Stereo), 15kHz Lowpass, Preemphasis, Main Audio Gain Adjust

settings. See page 2-51

for additional configuration information.

– MPX Over AES: this source allows for further configuration via the

Digital Level setting. See page 2-51 for additional configuration

information.

Page 2-50 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Main audio - additional configuration settings:

– Analog Level: applies to Left/Right/Mono source only; enter value

between -12 and +12 dBu, which represents the input voltage level that yields 100% modulation (typically 4.7 dBu).

– Digital Level: applies to Primary Digital, Secondary Digital and MPX

Over AES

sources only; enter value between -25.5 and 0 dBFS, with a

typical setting of -4 dBFS (100% modulation value).

–Audio Mode: select Mono L, Mono R, Mono L+R or Stereo (applies to

Left/Right/Mono, Primary Digital or Secondary Digital sources;

selecting

– 15kHz Lowpass Filter: applies to Left/Right/Mono, Primary Digital, and

Secondary Digital

Stereo applies a 19 kHz pilot).

audio modes; select On (applies 15 kHz low-pass filter

to audio input) or Off.

–Preemphasis:

select 0 us, 25 us, 50 us or 75 us. This setting applies to all

sources except MPX.

– Main Audio Gain Adjust: applies to Left/Right/Mono source only;

allowable range is -20 to 10 dB. This configuration setting will increase the incoming signal level and yield a proportional increase in % modulation.

–MPX Level: applies to MPX source only. Set this parameter level in Vpp

(typically 3.5 Vpp - 100% modulation value). The allowable range for this setting is between 1-5 Vpp.

Issue 3.3 2014-12-10 Page 2-51

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.37: Presets - SCA

SCA - (see Figure 2.37)

• MPX SCA Connector (J7:A for SCA1, J7:B for SCA2) for use with an externally gen-

erated SCA; select Enabled or Disabled. When enabled, all the selections listed below are active.

– Input Level: signal level that represents 10% modulation. Enter a value

between 1 and 5 V p-p (typically 2.83 Vpp).

• SCA Reduction Attenuation applied to the SCA input; set between 0 and 20% (used to

reduce the modulation level of the main audio when SCAs are enabled; typically, for every 2% of SCA modulation, the main audio modulation must be reduced by 1%).

• Internal SCA1/2 Enable or disable the appropriate internal SCA (SCA1 or SCA2). When

enabled, the settings listed below are active for the associated SCA signal (1 or 2).

– SCA1 or SCA2 Injection Level: enter value between 0 and 20% (typically

10%); this level is added to the composite baseband signal.

– SCA1 or SCA2 Frequency: enter value between 20 and 100 kHz (typically

set to 67 kHz or 92 kHz).

–SCA1 or SCA 2 Input Level: enter value between -12 and +12 dBu, which

represents the input voltage level that yields 10% modulation (typically

4.7 dBu).

Page 2-52 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

– SCA1 or SCA2 Lowpass Filter: select Enabled (applies 7.5 kHz low-pass

filter to audio input) or Disabled.

– SCA1 or SCA2 Preemphasis:

– SCA1 or SCA2 Mode: select FM (frequency modulated sub-carrier, typical)

or DSB-SC (double side band suppressed carrier).

Figure 2.38: Presets - RDS

select 0 us, 50 us, 75 us or 150 us.

Note:

Refer to FCC guidelines for allowable modulation depth with SCAs or RDS enabled.

RDS - (see Figure 2.38)

• RDS When Enabled, all the selections listed below are active.

–RDS Local Echo: select Enabled or Disabled. When Enabled, the exciter

RDS port transceiver will echo all inputs and controls received back to the terminal.

Issue 3.3 2014-12-10 Page 2-53

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

–Data Source: select Ext. UECP, Internal RBDS, Internal RDS or Ext.

ASCII, ASCII Over IP, UECP Over IP.

–Injection Level: enter value between 0 and 10% (typically 5%). This level

is added to the composite baseband signal.

–Phase: enter value in degrees.

–Baud Rate: select 75, 150, 300, 600, 1200, 2400, 4800, 9600, 19200,

38400 or 57600 bps. This selection does not apply to internal data sources.

– PI Code (hex): (programme identification code) this unique code is used

to identify a broadcast station. Every station gets assigned a specific code with a country identifying prefix. In the USA this code is determined by applying a formula to the station's call sign. Additional information can be found at www.nrscstandards.org. This selection applies to internal data sources only.

–PS Code: (programme service code) this is simply an eight-character static

display that represents the call letters or station identity name. Most RDS capable receivers display this information and, if the station is stored in the receiver's presets, will cache this information with the frequency and other details associated with that preset. This selection applies to internal data sources only.

–PTY: this coding of up to 31 pre-defined programme types allows users to

find similar programming by genre. This selection applies to internal data sources only.

–PTYN: (programme type name) this field can be used for detailed

description of the PTY by 8 digits. Example: if the PTY is 4 (Sport) a PTYN like "Cycling" could be transmitted. The PTYN is intended for displaying additional information only and cannot be used for automatic station tuning like the PTY. The PTYN is optional and not obligatory. This selection applies to internal data sources only.

– Music/Speech: select Music or Speech. This selection applies to internal

data sources only.

Page 2-54 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

–Traffic Info: select None, TA (Traffic Announcement) , TP (Traffic

Programme) or TA +T P. The receiver can often be set to pay special attention to this flag and, for example, stop the tape/pause the CD or retune to receive a traffic bulletin. The TP flag is used to allow the user to find only those stations that regularly broadcast traffic bulletins whereas the TA flag is used to signal an actual traffic bulletin in progress. This selection applies to internal data sources only.

– Alternate Frequencies: select None or 1 through 6. This allows a

receiver to re-tune to a different frequency providing the same station information when the first signal becomes too weak. This is often utilized in car stereo systems. This selection applies to internal data sources only.

– Artificial Head: select Ye s or No. This selection is a decoder

identification operating mode flag.

– Compression Flag: select Yes or No. This selection is a decoder

identification operating mode flag.

–Dynamic: select Yes or No. This selection is a decoder identification

operating mode flag.

– Stereo: select Ye s or No. This selection is a decoder identification

operating mode flag.

Note:

Refer to FCC guidelines for allowable modulation depth with SCAs or RDS enabled.

Issue 3.3 2014-12-10 Page 2-55

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.39: Presets - Other Settings

Other Settings - (see Figure 2.39)

• Other Settings Provides the following sub-functionality:

– Pilot Level: enter value between 6 and 12 % (typically 9 %). This level is

added to the composite baseband signal.

– Pilot 1 PPS Sync: select Enabled.

–Pilot Sync Phase:

if Pilot 1 PPS Sync is enabled, enter value between 0

and 360 degrees (typically 0 degrees).

–Sample Output: determines which sample signal will be present on

exciter’s rear panel PILOT/MPX SAMPLE OUT BNC connector. Select

Pilot

(default setting, pilot sample present) or MPX (Composite)

(composite baseband signal present).

– Audio Delay: select Enabled, then enter value in the allowable range of

0-12000 ms

. Default is 0. Audio Delay is used to time align the receiver

output of decoded analog and digital audio signals.

Page 2-56 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

– Auto Changeover Action: users can select which preset they want the

transmitter to switch to in the event of an automatic exciter changeover. This function is ideal for changing to a preset that has a different HD PA Volts value, which is required when a different exciter is active - e.g. HD Power Boost active exciter A requires less HD PA Volts to comply with spectral mask, thus improving dissipation. However if an automatic changeover to non-HD Power Boost enabled exciter B occurs, the Auto

Changeover Action

preset will have a higher HD PA Volts value (less

efficient, but required in order to comply with spectral limits).

–Mod Loss Timeout: select Enable if so required. If Enable is selected the

following sub-fields will appear:

– Action: select the action to take on the loss of a modulating signal

post the timeout period. Select None (no resulting action), Inhibit (inhibits the RF output and fans until the audio returns) or Change

Preset

(changes the active preset).

– Mod Loss Preset: displayed only if Action is set to Change Preset.

Select the preset from the drop down list that will activate upon the loss of a modulating signal, post the timeout period.

– Timeout Minutes: sets the delay, in minutes, between modulation

loss detection and the resulting action. Enter a value in the allowable range of 0 and 255 minutes.

– Timeout Seconds: sets the delay, in seconds, between modulation

loss detection and the resulting action. Enter a value in the allowable range of 0 and 59.9 seconds.

Threshold: sets the threshold for modulation loss detection. Enter

–

a value in the allowable range of 0 and 100%.

–Hard Limiter: select Enabled, then enter the hard limit threshold

percentage (allowable range is 0-160%, defaulted to 140%). If enabled, the modulation level will be limited (audio signal clipped or distorted) if it exceeds the hard limit threshold.

Issue 3.3 2014-12-10 Page 2-57

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

–AGC Limiter: select Enabled, then enter AGC Limit percentage (allowable

range is 0-160%, defaulted to 120%) and Time Constant (allowable range is 0-1000 ms, defaulted to 0 ms). If Enabled, when the modulation level exceeds the AGC Limit, the gain of the audio input will instantly decrease in order to reduce the modulation level below the AGC limit threshold. Recovery from this audio gain reduction is dependent on the Time

Constant

delay (fast attack, slow recovery). The input signal is briefly

distorted by the audio gain reduction when the threshold is exceeded.

–Two Slope Limiter: if Enabled, when the modulation level exceeds the

Threshold, the gain of the audio input will instantly change according to

the gain percentage setting (percentage of the initial gain, that which is below the threshold). The input signal is distorted by the audio gain change.

–Threshold (allowable range is 0-160%, defaulted to 120%). –Gain (allowable range is 0-100%, defaulted to 56.2%).

–L/R Limiter: this look-ahead limiter can be applied to the signal

immediately before the stereo generator in the exciter. It has a fixed attack time (and corresponding delay) of approximately 1 ms. It can be configured to reduce the signal, if the gain setting is 0 dB or less, or can be used to perform an AGC function and boost quiet sections of the audio if a positive gain setting is used. If Enabled, enter the following parameters:

– Max Gain (allowable range is -20 to 20 dB, defaulted to 0 dB). – Decay Time (allowable range is 0 to 60 s, defaulted to 0 s). – Hold Time (allowable range is 0 to 60 s, defaulted to 0 s).

MPX Power Limiter: if Enabled, enter MPX RMS Limit . This limit

–

allows the broadcast signal to remain in compliance with the MPX power limits as suggested in ITU-R BS.412-9. While the limiter will keep the transmitter in compliance, it is recommended that adjustment to the processing be made in such a way as to minimize the reductions performed by the limiter. Otherwise, the signal will not take advantage of the peak modulation capability available.

–

MPX RMS Limit (allowable range is -12 to 12 dBr, defaulted to 0 s).

Page 2-58 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Viewing transmitter status

You can view the NV30/NV40’s operational status using the Transmitter Status page - see

Figure 2.40. This page shows current active alarms and status to aid in fault diagnosis. To view the Transmitter Status page, select

This section includes the following topics:

• Viewing alarm details on page 2-60

• Status button colour indications on page 2-60

• Resetting alarms on page 2-60

Figure 2.40: Transmitter Status page

Status from the AUI bottom banner.

Issue 3.3 2014-12-10 Page 2-59

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

= low (RF output not affected)

= medium (RF output may be reduced)

= high (RF output may be inhibited)

Viewing alarm details

The Transmitter Status page - see Figure 2.40 on page 2-59 displays a table that lists the active alarm details under the following columns:

• Device - identifies the alarms by their originating device (e.g., Controller, Exciter A, etc.)

• Alarm - identifies the type of alarm (alarm name).

• Level - identifies the severity level of the alarm.

Note:

When viewing alarms, cross reference the alarm name, (which appears in the Alarm column of the Transmitter Status page) with Table 1.1 of the Troubleshooting Manual.

Status button colour indications

• When the Status button is red, one or more active alarms are indicating that the transmitter

may be in an ‘off-air’ state.

• When the Status button is amber, one or more active alarms are indicating that the transmit-

ter is still ‘on-air’, but may be at reduced power.

• When the

ing normally.

Status button is green, no alarms are being reported and the transmitter is operat-

Resetting alarms

When an alarm is present, use the Reset button, at the bottom of any AUI screen, (see Figure 2.41) to clear any latching alarms that are holding the transmitter in an “off-air” state. If the offending alarm has cleared, then the transmitter should resume operation.

Figure 2.41: Reset Button

Page 2-60 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Factory Settings

Values for critical parameters are set using the Factory Settings page (see Figure 2.42), which is accessed from the the page to open related information on the right-side of the page.

WARNING: Device settings are established at the factory and should not require any adjustment. These settings affect critical system protection circuits. Making changes to these settings may void your warranty. Contact Nautel before making changes.

This section includes the following topics:

• System configuration on page 2-62

• Transmitter type on page 2-63

• Scaling on page 2-64

Menu page. To use this page, simply select an item from the list on the left-side of

• Thresholds on page 2-65

• Redundant supplies on page 2-66

• IPA bias balance on page 2-67

• PA field bias on page 2-69

Figure 2.42: Factory Settings

Issue 3.3 2014-12-10 Page 2-61

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

System configuration

This factory setting (see Figure 2.43) configures the type of system the transmitter will be part of, sets

ALC Limit (in %), and sets the cooling Fan Voltage.

the

•System Type

– Standalone: indicates the transmitter operates by itself.

– SC1 Combined: indicates the transmitter operates as part of a combined

system and is controlled by the SC1 system controller.

– N+1: Indicates the transmitter operates as part of a main/standby or +1

backup for N other transmitters, and is under the control of the SC1 system controller.

•ALC Limit Allowable range is 0-135%, with a typical value of 100%. ALC limit allows

the transmitter to compensate for any power shortfall by setting DAC limit at a higher percentage than should be required.

• Fan Voltage

Figure 2.43: Factory Settings - System Configuration

Allowable range is 30-53V, with a the typical value of 48V.

Page 2-62 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Transmitter type

This factory setting parameter (see Figure 2.44) allows for setting the transmitter type (NV5, NV10, NV20 etc.). This setting is one-time, factory configured and cannot be changed.

Figure 2.44: Factory Settings - Transmitter Type

Issue 3.3 2014-12-10 Page 2-63

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Scaling

This factory setting (see Figure 2.45) supports the calibration of various metered parameters.

Figure 2.45: Factory Settings - Scaling

Note:

FM and FM+HD modes display analog tranmitter power output in the top banner of the AUI. HD and DRM+ modes display total digital RMS power. For FM+HD if the total RMS power is desired, see applicable meters in controller device list. See Identifying meter information on

a specific sub-device on page 2-42.

Page 2-64 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Thresholds

This factory setting (see Figure 2.46 and Figure 2.47) supports the setting of alarm thresholds for critical parameters. Select the desired threshold from the list located in either the

Module

tabs and touch the applicable field to enable editing. The current threshold is displayed.

Enter the new threshold and press Apply to save changes.

Figure 2.46: Factory Settings - Thresholds (Transmitter) - Default Values Shown

Transmitter or RF

Figure 2.47: Factory Settings - Thresholds (RF Modules)- Default Values Shown

Issue 3.3 2014-12-10 Page 2-65

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Redundant supplies

This factory setting (see Figure 2.48 ) supports configuring redundant fan, IPA, LVPS and 12 V power supplies. Select standalone.

Figure 2.48: Factory Settings - Redundant Supplies

Ye s (default) if the supply operates as a redundant set. Select No if the supply is

Page 2-66 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

IPA bias balance

IPA Bias Balance (see Figure 2.49 on page 2-68) allows for optimal balancing of RF power module

outputs to minimize reject load power. An when balancing is suggested. This may occur after an RF power module has been replaced or repaired. While RF is enabled (on) and the transmitter is operating at the desired power level in the desired preset, press the the Save and Cancel buttons will activate to either save the result to the active preset or abort the function without affecting the previous balance. Note that the user may press Stop while a balancing is in process but still save or cancel the interim result.

The balancing progress may be observed by monitoring the Reject Power Percentage meter. Balancing targets a reject power percentage of 0.75% or less of the transmitter’s maximum power capability. (An IPA Balancing Recommended alarm will be generated if this percentage exceeds

1.5%.)

While this routine can be performed when operating in most presets (as the DAC bias numbers are stored in the controller’s EEPROM), it should also be noted that this balancing process affects only the active preset.

Start button to initiate the process. When the process has been completed,

IPA Balancing Recommended Alarm will be generated

Note:

IPA bias balancing cannot be performed when the transmitter is in the Current Settings preset. Users must have an active preset saved (without edits) in order for the updated IPA bias data to be stored properly. IPA bias balancing can also not be performed if there is a module fault present (e.g. PA fail).

Users may also adjust the bias values individually to either a user specified value or to the default value saved in that module’s EEPROM (see Factory Settings - PA Field Bias on page 2-69). Note, that if an auto-balance is started any user set values will be replaced with default values before the process starts. Therefore, manual adjustment should be undertaken only after an auto-balancing has been completed or manually stopped.

Issue 3.3 2014-12-10 Page 2-67

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

IPA Bias DAC 1 = Module 1 IPA Bias DAC 2 = Module 2

Figure 2.49: Factory Settings - IPA Bias Balance

Note:

The IPA Bias Balance function targets the lowest possible total transmitter reject power. However, there is no guarantee that it will achieve less than a specific amount. Variables such as RF module output power and phase differences result in system reject power that can sometimes not be compensated for with this function.

Note: The Reject Power Percentage meter is only available in this functional menu. The green/amber/

red colours are simply to provide user feedback as to the progress of the function. If the transmitter is operating normally, without fault, and the total reject power percentage falls within the amber or red "post" an IPA bias balance routine, there is nothing to be concerned with, the function is simply not able to completely compensate for the reject power (phase/amplitude differences).

Page 2-68 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

PA field bias

This factory setting (see Figure 2.50) allows the user to easily set the applicable bias values from the control tag provided with the replacement PA.

Select which RF Module and PA position the replacement PA was installed in, then enter the Bias

Valu es

The Bias Values fields accept only a decimal number format. Enter the decimal number from the control tag, or if your spare PA control tag specifies a hexadecimal number, convert it to decimal and then enter the appropriate decimal number.

Figure 2.50: Factory Settings - PA Field Bias

for indices 1 through 5 from the factory supplied control tag.

Issue 3.3 2014-12-10 Page 2-69

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

System Settings

Users determine critical system configuration parameters via the System Settings page (see

Figure 2.51), which you access from the

This section includes the following topics:

• Reset on page 2-71

• Upgrade software on page 2-72

• Exciter TCXO on page 2-73

• IBOC settings on page 2-73

• Audio input calibration on page 2-75

• Turn-on delay on page 2-76

• Defaults on page 2-76

Menu page.

• FM polarity on page 2-78

Figure 2.51: System Settings Page

Page 2-70 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Reset

The Reset page (see Figure 2.52) allows users to reboot three items - the AUI, the active exciter and the standby exciter (if installed).

Figure 2.52: System Settings - Reset

Procedure to reset the AUI or either Exciter:

1. Select the Reset option from the left-side of the System Settings page to open a related

window on the right-side of the page.

2. Reset the items by pressing the appropriate key.

• To reset the AUI (advanced user interface), press

• To reset the active exciter press Reboot Active Exciter

• To reset the standby exciter press Reboot Standby Exciter.

After rebooting the AUI, users will need to log back into the transmitter AUI once again (see Logging

into the AUI on page 2-3). If the active exciter is rebooted, the transmitter’s RF power will be

interrupted if in RF On mode but the AUI will not be reset. If the standby exciter is rebooted, the transmitter’s RF power will not be interrupted if in

RF On mode, nor will the AUI be reset.

Reboot AUI.

Issue 3.3 2014-12-10 Page 2-71

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Upgrade software

The Upgrade Software page allows for uploading a suite of software upgrade files (.tgz files) via remote connection. Navigate the page as described below. Please note that users cannot add upgrade files via the local AUI touchscreen. For additional information on loading software, see Upgrading

software on page 4-1 of this manual.

Figure 2.53: System Settings - Upgrade Software (Remote Upgrade Shown)

Select the Upgrade Software option from the left-side of the System Settings page to open a related window on the right-side of the page. The page consists of the following sections and buttons:

• Current Version - indicates the current software version.

• Select Upgrade File - displays the available upgrade files uploaded to the transmitter.

• Details - opens a window containing information about the installed software. If an upgrade

file is selected, the screen will show a comparison between the installed version and the selected upgrade by component. Identical versions are shown in green; different versions are shown in red. You can also view the details of the previous upgrade by pressing the View

Last Upgrade

checkbox.

• History - displays a window containing a history of the upgrades to the software. Press the

+ button to maximize the details of the software. You can save this information to disk as a .txt file from the remote AUI.

Start Upgrade - begins the process of upgrading the current software with the selected

•

upgrade file.

•

Manage Files (available through the remote AUI only) - opens a window displaying the files

you can upload to upgrade the software. You can add or delete files from this list using the

Browse, Upload and Delete buttons in the window.

Page 2-72 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

TWO TABS SHOWN FOR DUAL EXCITERS

Exciter TCXO

This system setting allows users to calibrate the internal clock to a user supplied external high precision 10MHz clock reference (e.g. GPS synchronized 10MHz clock). Once this external 10MHz clock reference is connected, the 10MHz Int-Ext Offset field will display the difference between the internal and external frequencies (in ppm). Users can press the Start button to automatically calibrate the internal TCXO to the external reference source; equally, they can manually enter the measured internal-external offset value into the TCXO Offset Value field and press Apply.

If no external high precision 10MHz clock reference is connected, but the actual transmitter carrier frequency is being measured with a calibrated external frequency counter, operators can manually offset the internal TCXO by entering the appropriate ppm difference in the TCXO Offset Value field. For example, if the frequency of the transmitter is 1 ppm too high, then a positive 1 ppm should be entered in the TCXO Offset Value field in order to compensate. Similarly, if the transmitter frequency is too low, enter a negative ppm value. After an adjustment is made, press Apply.

For dual exciters, two tabs appear (Exciter A and Exciter B) to allow calibration of each exciter.

Figure 2.54: System Settings - Exciter TCXO

IBOC settings

This system setting (see Figure 2.55 on page 2-74) allows users to establish Forward Tap Delay, FM+HD Low Inj Gain, FM+HD High Inj Gain and HD only system Gain levels. It also allows for an IBOC power calibration. Changes apply to the active exciter (A or B) only. To calibrate the other exciter, switch to the other exciter and repeat the change.

Issue 3.3 2014-12-10 Page 2-73

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

• Forward Tap Delay - This field displays the time delay (in unit taps) between the forward

path signal from the exciter and the reverse path signal into the exciter, fed back from the output of the transmitter. This value is factory adjusted (to synchronize the phase of the forward and reverse signals so that pre-correction can operate properly) and should not require any adjustment in the field.

• Auto-Find Gain - Press the Start button to automatically find the optimized gain while the

transmitter is RF On and in the applicable preset mode/injection level.

• FM+HD Low Inj Gain - Applicable for FM+HD mode only (at -20dBc to -15.1dBc injection

levels) and represents the starting/default gain applied to the forward path signal within the exciter at initial turn on/ramp-up.

•FM+HD High Inj Gain - Applicable for FM+HD mode only (at -15dBc to -10dBc injection

level) and represents the starting/default gain applied to the forward path signal within the exciter at initial turn on/ramp-up.

•HD Gain - Applicable for HD mode only and represents the starting/default gain applied to

the forward path signal within the exciter at initial turn on/ramp-up.

•IBOC Power Calibration - This calibration occurs at the factory and should not require any

adjustment in the field. This calibration is performed in FM mode.

• Calibration Value - This field displays the calibration of the exciter’s measurement of the

transmitter power.

Figure 2.55: System Settings - IBOC Settings

Page 2-74 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Audio input calibration

This system setting (see Figure 2.56) supports the calibration of analog and MPX (composite) audio inputs. The peak meter value of each calibrated audio input (

MPX Peak, MPX SCA Peak, Int. SCA1 Peak and Int. SCA2 Peak) will be displayed (when the

associated audio input source is connected). Enter the calibration value and press Apply to save changes. Changes apply to the active exciter (A or B) only. To calibrate the other exciter, switch to the other exciter and repeat the calibration.

Figure 2.56: System Settings - Audio Input Calibration

Analog Left Peak, Analog Right Peak,

Note: Audio inputs are factory set using a high accuracy source and do not typically require user adjustment. Changes to factory calibrations could cause low or excessive modulation and noncompliance to strict regulatory limits

Issue 3.3 2014-12-10 Page 2-75

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Turn-on delay

This system setting (see Figure 2.57) allows users to delay the start-up (RF on) of the transmitter when recovering from an ac power loss, in order to limit the simultaneous power demand from multiple transmitters on a common generator by staggering their turn on sequence. Enter a value in the allowable range of 0-120 seconds, defaulted to 0 seconds (disabled).

Figure 2.57: Turn-On Delay

Defaults

The Defaults page stores the default settings for RF module IPA bias and PA bias (see Figure 2.58

on page 2-77) as a function of mode (Bias tab). It also stores the default Exciter power level based on

transmitter type and default IPA output power (referenced to 98MHz) via the Power tab (see

Figure 2.59 on page 2-77). These settings are fixed and should require no adjustment by the user.

The transmitter RF modules store bias values in EEPROM that are pre-determined at the factory for optimal operation of the IPA and PAs for each available mode. These varying levels of bias values are stored in indexes 1 through 5, with index 0 having 0 bias stored (0 being the lowest amount of bias, 5 being the highest). The IPA and PA index values are set based on the bias requirements of each mode.

Note:

The transmitter automatically adjusts the actual IPA Power set-point based on the preset frequency (as a function of a pre-determined frequency response), with the reference power level value being at 98MHz.

Page 2-76 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Figure 2.58: Defaults - Bias (IPA and PA default index values shown)

Figure 2.59: Defaults - Power

Note: Default Exciter Power is transmitter specific; NV3.5/NV5 = 11W; NV7.5/NV10 = 25W; NV15/NV20 = 65W and NV30/NV40 = 130W.

Default IPA Power at 98MHz is 110W.

These values are factory determined and should not require adjustment. These values apply for FM mode only.

Issue 3.3 2014-12-10 Page 2-77

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

FM polarity

This system setting (see Figure 2.60) allows users to invert the polarity of the frequency modulation; (i.e. positive going modulation signal yields positive deviation; or positive going modulation signal yields negative deviation). Options are Normal (default) or Inverted.

Figure 2.60: FM Polarity

Page 2-78 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

User accounts

Depending on user permission rights, you can set up accounts to allow certain users to access and control features of the AUI using the User Accounts page - see Figure 2.61. To view the

Accounts

This section includes the following topics:

page, select User Accounts from the Menu options.

Note:

Depending on the permission level assigned to a given user, some features shown in Figure 2.61 may not be displayed or available.

• Setting user permission level on page 2-80

• Editing account information on page 2-80

User

Figure 2.61: User Accounts page

Issue 3.3 2014-12-10 Page 2-79

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Setting user permission level

There are four levels of permission that can be assigned to users, each with their own specific function. All users have permission to change their own username and password, but are otherwise limited to the following functions:

• View Only: Can monitor equipment data only. No administrative or control functions.

• Full Control: Can monitor and control equipment, with no administrative functions.

• Administrator: Can perform all functions. Administrator is the only permission level that

allows addition, removal or modification of users.

• Custom: Administrator can customize the user permissions by manually selecting the per-

mission levels.

Editing account information

Adding an account

You must be an Administrator to use this function.

Procedure to add a user (see Figure 2.62 on page 2-82):

1. Open the User Accounts page.

2. Press Add (bottom of the screen) to open a small Add User window.

3. Beside Username, enter a name that identifies the new user, and press OK.

4. Select the new user to edit the settings.

5. Beside

you select Custom as the type of user, then go to the Permissions section of the screen and mark individual permissions (see Changing permissions on page 2-81).

6. Press Apply to confirm your entries and create a new user or press Cancel to ignore your

entries and exit the small window without creating a new user.

Editing an existing account

To edit an existing user account, press on the desired user in the Users list on the left-side of the AUI. The

Settings for that user will be displayed on the right-hand side of the AUI. You can edit the

Password, User Type (see Setting user permission level above), Auto Login status and Permissions.

User Type, press the arrow to reveal a drop-down menu and select a type of user. If

Page 2-80 Issue 3.3 2014-12-10

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

Changing the password

To change your password, press the Change Password button. A menu appears that prompts you to enter the old password, new password and confirmation of the new password. Press Apply to save or

Cancel to exit this menu (see Figure 2.62 on page 2-82).

Setting auto login (local only) status

When checked (

) the selected user account will be automatically logged in to the transmitter with all

the rights and priveleges that have been assigned to that user. There may only be one autologin user at any given time; when the Auto Login check box is selected for one user account, it is automatically cleared on all other users. When not checked, the transmitter will not login automatically and will instead prompt for username and password when it boots up. It should be noted that only accounts with Administrator level permissions can set or remove Auto Login status.

Changing permissions

You must be an Administrator to edit this function.

All users have permission to change their own username and password. You can customize the permissions assigned to a user or simply pick a predetermined set of permissions based on the user type.

Procedure to change user permissions (see Figure 2.62 on page 2-82):

1. Open the User Accounts page.

2. Select a user from the Users list to display the permissions for that user in the center of the

Permissions window. The permissions associated with the selected user are identified with a

checkmark ().

3. Press on User Type to reveal a drop-down menu and select a new type of user.

4. If the user type in step 3 is

checkmark (

) beside each permission that you want to associate with the user. The boxes

Custom, set individual permissions. Under Permissions, place a

work like a toggle - select the checkbox to place a checkmark and select again to remove the checkmark. Choose one or more of the following options:

Activate/Modify Preset - Allows the user to modify presets and change the active preset.

•

Power Control - Allows the user to change the power set point of the transmitter..

• Delete Logs - Allows the user to remove log entries.

RF On/Off - Allows the user to turn the RF output on and off..

•

Issue 3.3 2014-12-10 Page 2-81

NV30/NV40 Operations and Maintenance Manual Operating the transmitter

• All Other Settings - Allows the user to adjust all settings not mentioned above, except for

administrating user accounts.

5. Press Apply to assign the new permissions to the selected user.

Removing an account

To remove a user account, select the desired user from the Users list and press the Delete button. A verification prompt will appear. Press Ye s to proceed or No to cancel the deletion.

Note:

Do not delete the SNMP_User account from the list of users.

Figure 2.62: User Accounts Page Layout

Page 2-82 Issue 3.3 2014-12-10

Nautel NV30, NV40, NV5, NV3.5 Maintance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual