ADC DSCSMR2P Users Manual

6 SPECIFICATIONS

Refer to the following tables for the system, host unit, and remote unit specifications. All specifications apply after a five minute warm-up period.

Tab le 2-5 – SCS 800/900 MHz SMR system nominal specifications

Tab le 2-6 – SCS 800 MHz system nominal specifications

Tab le 2-7 – SCS 1900 MHz system nominal specifications

Tab le 2-8 – Host Unit nominal specifications

Tab le 2-9 – WDM nominal specifications

Tab le 2-1 0 – Remote Unit nominal specifications

ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-5. SCS 800/900 MHz SMR System Nominal Specifications

PARAMETER SPECIFICATION REMARKS

Optical - Host and Remote Unit

Fiber type 9/125, single-mode

Number of fibers required 1 for single-band remote unit

2 for dual-band RU

Forward path wavelength 1550 nm

Reverse path wavelength 1310 nm

Optical transmit power output Host Unit Remote Unit

0 dBm +1.3 dBm (includes WDM insertion loss)

Optical budget 25 dB

Optical Receiver Input Maximum –15 dBm

Optical connectors UPC/SC Host unit

OptiTap APC/SC Remote unit

RF Forward Path - 800/900 MHz

System bandwidth 18 MHz

5 MHz

Frequency range 851–869 MHz

935–940 MHz

Gain of forward path

78.1 dB (typical) At band center, room tempera(Host input to Remote primary antenna port)

Gain flatness Band flatness Channel flatness

± 2.0 dB across freq. range ± 1.5 dB variation across any

1.25 MHz channel

All SCS remote units include a WDM.

For optical BER of 10

–6

800 MHz transmit 900 MHz transmit

ture, and 0 dB attenuation setting. Includes power amplifier.

Gain variation ± 3 dB over temp and unit-to-

Propagation delay < 6 μs (typical) Excludes fiber delay

Configurable propagation delay Range Step size

Spurious In-band self generated Dynamic range (noise floor)

Transmit peak-to-average >

Two-tone Intermodulation <

Nominal composite RF input signal level

Configurable input level Range Step size

Page 2-20

unit

Plus standard propagation delay

0 to 63 μs

0.1μs ± 100 ns

<–13 dBm at remote output <–60 dBc at 30 KHz bandwidth

10 dB

–52 dBc two tones @ 5 Watts each

–40 dBm at 0 dB attenuation –9 dBm at max. attenuation

–20 dBm is the optimal RF input signal level.

31 dB 1 ± 0.5 dB ±10% of attenuation monotonic

ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-5. SCS 800/900 MHz SMR System Nominal Specifications, continued

PARAMETER SPECIFICATION REMARKS

Composite RF Output power of both bands (see Note 1at end of table)

38.1 dBm (6.5 Watts) at remote antenna port with –40 dBm input

10 Watts at LPA output

Configurable RF Output Range Step size

31 dB at remote unit 1 ± 0.5 dB ± 10% of attenuation monotonic

Transmit path insertion loss 1.9 dB typical

RF Reverse Path - 800/900 MHz

System bandwidth 18 MHz

5 MHz

800 MHz receive 900 MHz receive

Frequency range 806–824 MHz

896–901 MHz

Propagation delay < 8 μs (typical) Excludes fiber delay

Configurable propagation delay Range Step size

Up to 63 μs

0.1μs ±1 100 ns

Plus standard propagation delay

Gain of reverse path Overall gain

30 ± 2 dB at band center at room temperature

Gain variation

3 dB over temperature

Gain flatness Band flatness Channel flatness

± 2.0 dB across frequency range ± 1.5 dB variation across any

1.25 MHz channel

Out-of-band rejection –40 dB at >

12.5 MHz from cen-

ter of subband

Spurious (in-band self gener-

–110 dBm referred to input

ated)

Intermodulation –62 dBc two tones @ –50 dBm

System noise figure 9 dB at mid-band

Configurable RF output Range Step size

31 dB 1 ± 0.5 dB ± 10% of attenuation monotonic

Blocking dynamic range 70 dB

Level limiting ALC threshold –40 dBm ± 3 dB instantaneous

Level limiting ALC range 27 dB

Note: Per Industry Canada Section 5.3 - The rated output power of this equipment is for single carrier operation. For situations where multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially where the output signal is re-radiated and can cause interference to adjacent band users. This power reduction is to be by means of input power or gain reduction and not by an attenuator at the output of the device.

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-6. SCS 800 MHz System Nominal Specifications

PARAMETER SPECIFICATION REMARKS

Optical - Host and Remote Unit

Fiber type 9/125, single-mode

Number of fibers required 1 for single-band remote unit

2 for dual-band RU

Forward path wavelength 1550 nm

Reverse path wavelength 1310 nm

Optical transmit power output Host Unit Remote Unit

0 dBm +1.3 dBm (includes WDM insertion loss)

Optical budget 25 dB

Optical Receive Input Maximum –15 dBm

Optical connectors UPC/SC Host unit

OptiTap APC/SC Remote unit

RF Forward Path - 800 MHz

System bandwidth A band B band

11 and 1.5 MHz 10 and 2.5 MHz

Frequency range A band B band

869–880 and 890–891.5 MHz 880–890 and 891.5–894 MHz

Out-of-band emissions Primary –13 dBm per 1 MHz bandwidth

from 10 kHz to 20 GHz

All SCS remote units include a WDM.

For optical BER of 10

–6

Gain of forward path (Host input to Remote primary antenna port)

Gain flatness Band flatness Channel flatness

Gain variation ± 3 dB over temp and unit-to-

Out-of-band rejection –40 dB at >

Propagation delay < 6 μs (typical) Excludes fiber delay

Configurable propagation delay Range Step size

Spurious In-band self generated Free dynamic range

Transmit peak-to-average >

Page 2-22

78.5 dB (typical) At band center, room tempera-

ture, and 0 dB attenuation setting. Includes power amplifier.

± 2.0 dB across freq. range ± 1 dB variation across any 1.25

MHz channel

unit

±17.5 MHz from

center of subband

Plus standard propagation delay

Up to 63 μs

0.1μs ± 100 ns

<–13 dBm at remote output <–60 dBc at 30 kHz bandwidth

10 dB

ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-6. SCS 800 MHz System Nominal Specifications, continued

PARAMETER SPECIFICATION REMARKS

Two-tone Intermodulation <–55 dBc at remote output Two tones @ 5 Watts each

CDMA Intermodulation 885 kHz to 1.25 MHz

1.25 to 1.98 MHz

1.98 to 2.25 MHz

–45 dBc per 30 kHz –8 dBm per 30 kHz –55 dBc per 30 kHz

Absolute level

Nominal composite RF input signal level

–40 dBm at 0 dB attenuation –9 dBm at max. attenuation

An input signal level of –40 dBm provides maximum output power

Configurable input level Range Step size

31 dB 1 ± 0.5 dB ±10% of attenuation monotonic

Composite RF Output power (see Note 1at end of table)

38.5 dBm (7.0 Watts) at remote antenna port with –40 dBm input

10 Watts at LPA output

Configurable RF Output Range Step size

31 dB at remote unit 1 ±0.5 dB ±10% of attenuation monotonic

Transmit path insertion loss 2.5 dB maximum

RF Reverse Path - 800 MHz

System bandwidth A band B band

11 and 1.5 MHz 10 and 2.5 MHz

Frequency range A band B band

824–835 and 845–846.5 MHz 835–845 and 846.5–849 MHz

Propagation delay 6 μs Excludes fiber delay

Configurable propagation delay Range Step size

Up to 63 μs

0.1μs ±1 100 ns

Plus standard propagation delay

Gain flatness Band flatness Channel flatness

1.5 dB across frequency range ±1 dB variation across any 1.25

MHz channel

Gain of reverse path Overall gain

30 ± 2 dB at band center at room

ALC not invoked

temperature

Gain variation

Out-of-band rejection –40 dB at >

3 dB over temperature

±17.5 MHz from

ALC not invoked

center of subband

Spurious (in-band self gener-

–110 dBm referred to input ALC not invoked

ated)

Intermodulation –62 dBc two tones at –50 dBm

System noise figure 8 dB at mid-band ALC not invoked

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-6. SCS 800 MHz System Nominal Specifications, continued

PARAMETER SPECIFICATION REMARKS

Configurable RF output Range Step size

31 dB 1 ± 0.5 dB ± 10% of attenuation monotonic

Blocking dynamic range 70 dB

Level limiting ALC threshold –40 dBm ± 3 dB instantaneous

Level limiting ALC range 30 dB

RF Forward and Reverse Path Modulation Accuracy

Service/Mod Type/Parameter TDMA/n/4-DQSK/rms EVM

GSM/GMSK/rms phase error EDGE/8PSK/rms EVM EIA-97D/CDMA/rho factor

7% 4º 7% .97%

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-7. SCS 1900 MHz System Nominal Specifications

PARAMETER SPECIFICATION REMARKS

Optical - Host and Remote Unit

Fiber type 9/125, single-mode

Number of fibers required 1 for single-band remote unit

2 for dual-band RU

Forward path wavelength 1550 nm

Reverse path wavelength 1310 nm

Optical transmit power output Host Unit Remote Unit

0 dBm +1.3 dBm (includes WDM insertion loss)

Optical budget 25 dB

Optical Receive Input –15 dBm

Optical connectors Host Unit Remote Unit

UPC/SC Host unit OptiTap APC/SC Remote unit

RF Forward Path - 1900 MHz

System Bandwidth 20 MHz AD band, 25 MHz

DBE, BEF, and EFC bands.

Frequency range AD DBE

BEF EFC

1930 to 1950 MHz 1945 to 1970 MHz 1950 to 1975 MHz 1965 to 1990 MHz

All SCS remote units include a WDM.

For optical BER of 10

–6

Out-of-band emissions (Primary)

Gain of forward path (Host input to Remote primary antenna port)

–13 dBm per 1 MHz bandwidth from 10 kHz to 20 GHz

77.7 dB (typical) At band center, room temperature, and 0 dB attenuation setting. Includes power amplifier.

Gain flatness Band flatness Channel flatness

± 1.5 dB across freq. range ± 1 dB variation across any 1.25 MHz channel

Gain variation ± 3 dB over temp and unit-to-

unit

Out-of-band rejection –40 dB at >

±17.5 MHz from

center of subband

Propagation delay < 2.5 μs Excludes fiber delay

Configurable propagation delay Range Step size

Up to 63 μs

0.1μs ± 100 ns

Plus standard propagation delay

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-7. SCS 1900 MHz System Nominal Specifications, continued

PARAMETER SPECIFICATION REMARKS

Spurious In-band self generated Free dynamic range

–13 dBm at remote output 60 dB at 30 kHz bandwidth

Transmit peak-to-average 10 dB

Two-tone Intermodulation –55 dBc at remote output two tones at 5 Watts each

CDMA Intermodulation 885 kHz to 1.25 MHz

1.25 to 1.98 MHz

1.98 to 2.25 MHz

–45 dBc per 30 kHz –8 dBm per 30 kHz –55 dBc per 30 kHz

Absolute level

Nominal composite RF input signal level

–40 dBm at 0 dB attenuation –9 dBm at max. attenuation

An input signal level of –40 dBm provides maximum output power

Configurable input level Range Step size

31 dB 1 ± 0.5 dB ±10% of attenuation monotonic

Composite RF Output power (see Note 1 at end of table)

37.7 dBm (5.9 Watts) at remote antenna port with –40 dBm input

Configurable RF Output Range Step size

31 dB at remote unit 1 ±0.5 dB ±10% of attenuation monotonic

Transmit path insertion loss 2.4 dB maximum

RF Reverse Path - 1900 MHz

System Bandwidth 20 MHz AD band, 25 MHz

DBE, BEF, and EFC bands.

Frequency range AD DBE BEF EFC

1850 to 1870 MHz 1865 to 1890 MHz 1870 to 1895 MHz 1885 to 1910 MHz

Propagation delay 2.5 μs Maximum Excludes fiber delay

Configurable propagation delay Range Step size

Gain flatness Band flatness Channel flatness

Gain of reverse path Overall gain

Gain variation

Out-of-band rejection –40 dB at >

Page 2-26

0 to 63 μs

0.1μs ±1 100 ns

1.5 dB across frequency range ±1 dB variation across any 1.25 MHz channel

30 ± 2 dB at band center at room temperature 3 dB over temperature

±17.5 MHz from

center of subband

Plus standard propagation delay

ALC not invoked

ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-7. SCS 1900 MHz System Nominal Specifications, continued

PARAMETER SPECIFICATION REMARKS

Spurious (in-band self gener-

–110 dBm referred to input ALC not invoked

ated)

Intermodulation –62 dBc two tones at –50 dBm

System noise figure 8 dB at mid-band ALC not invoked

Configurable RF output Range Step size

31 dB 1 ± 0.5 dB ± 10% of attenuation monotonic

Blocking dynamic range 70 dB

Level limiting ALC threshold –40 dBm ± 3 dB instantaneous

Level limiting ALC range 30 dB

RF Forward and Reverse Path Modulation Accuracy

Service–Mod Type–Parameter TDMA–π/4-DQSK–rms EVM GSM–GMSK–rms phase error EDGE–8PSK–rms EVM

EIA-97D–CDMA–rho factor

7% 4º 7%

0.97%

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-8. Host Unit Nominal Specifications

PARAMETER SPECIFICATION REMARKS

Physical/Environmental/ Electrical - Host Unit

Dimensions (H×W×D) Rear Access

3.5 × 17.1 × 12.2 inches (88 × 433 × 311 mm)

Front Access

3.5 × 17.2 × 15.3 inches (88 × 437 × 389 mm)

Mounting 19- or 23-inch rack EIA or WECO

Weight 18 lbs. (8.2 kg)

Weather resistance Indoor installation only

Operating temperature 0º to 50º C (32º to 122º F)

Storage temperature –40º to 70º C (–40º to 158ºF)

Humidity 10% to 90% No condensation

Optical ports UPC/SC

Dimension for width does not include the mounting brackets which can be installed for either 19- or 23-inch racks.

External alarm connector Screw-type terminals NO and NC relay contacts

DC power connector Screw-type terminal strip

RF coaxial cable connectors 50 ohm N-type (female) 50 ohms input/output impedance

Service connector DB-9 (female) RS-232 DTE interface

Auxiliary connector DB-9 (female) Not used with SCS systems

CAN connectors RJ-45 jack

Voltage input Nominal ± 24 or ± 48 VDC ± 21 to ± 60 VDC

Power consumption 55 watts

Current rating 1 Amp at –48 VDC

Reliability at 25ºC MTBF 80,000 hours Excluding fans

Table 2-9. Host Unit and Remote Unit WDM Nominal Specifications

PARAMETER SPECIFICATION REMARKS

Optical - WDM

Passband 1310 nm ± 20 nm

1550 nm ± 20 nm

Forward path insertion loss Host WDM Remote WDM

0.7 dB

0.3 dB

Does not include connector loss

Reverse path insertion loss Host WDM Remote WDM

0.3 dB

0.7 dB

Does not include connector loss

Isolation > 30 dB minimum

Return loss (Reflectance) < –50 dB All input ports

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

Table 2-10. Remote Unit Nominal Specifications

PARAMETER SPECIFICATION REMARKS

Physical/Environmental/ Electrical - Remote Unit

Dimensions (L×W×D) Single-Band

29.4 × 9.7 × 5.7 inches

(747 × 246 × 145 mm) Dual-Band and Interim Single Band

37.3 × 10.2 × 7.5 inches

(947 × 259 × 191 mm)

Mounting Pole, wall, or strand mounted Requires accessory kit for strand

mounting

Weight Single-Band Dual-Band and Interim Single

51.2 lbs. (23.2 kg)

90.5 lbs. (41.0 kg)

Without solar shields installed

Band

Weather resistance (see Note) NEMA-6, IEC IP67 Indoor or outdoor installation

Lightning protection 20 kA IEC 1000-4-5 8/20 µs

waveform

Provided by external lightning protector (accessory)

Operating temperature –30º to 50º C (–22º to 122º F)

Storage temperature –40º to 70º C (–40º to 158ºF)

Humidity 10% to 90% No condensation

AC power connector Mini 3-pin 3-wire power cable included

Antenna connector(s) 50 ohm N-type (female) 50 ohms input/output impedance

Optical port(s) APC/SC hardened adapter

Voltage input 90 to 265 VAC, 47 to 63 Hz

60 to 89 VAC, 47 to 63 Hz

Standard Option

Power consumption Single-Band (all types)

Dual-Band

300 VA at 120 VAC

600 VA at 120 VAC

Current rating Single-Band (all types) Dual-Band

2.5 Amps at 120 VAC

5.0 Amps at 120 VAC

Requires 15 Amp circuit

Reliability at 25ºC MTBF - 50,000 hours

Note: The SCS remote unit has been tested to assure it meets the dust and water resistance requirements of IP67 as specified by IEC Publication 60529. These tests were conducted using closure caps attached to the remote unit cable ports. To assure the dust and water resistance level is maintained, it is the responsibility of the user to select AC power, antenna, and fiber optic cable assemblies that have a dust and water resistance level of IP67 or higher. If user is uncertain of cable manufacturers that meet this requirement, please contact ADC Technical Assistance.

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ADCP-75-187 • Issue 3 • September 2006 • Section 2: DESCRIPTION

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Page 2-30

SECTION 3: OPERATION

Content Page

1 BEFORE STARTING OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

1.1 Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

1.2 Readiness Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

2 TURN-UP SYSTEM AND VERIFY OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

2.1 Reference Procedure: Determine Forward Path Input Signal Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

2.2 Reference Procedure: Enter Site Name and Site Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

2.3 Reference Procedure: Enter Host Forward Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

2.4 Reference Procedure: Determine Output Signal Level at RU Antenna Port . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

2.5 Reference Procedure: Enter Remote Forward Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

2.6 Reference Procedure: Enter Host Reverse Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

2.7 Reference Procedure: Enter Host Forward and Reverse Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

_________________________________________________________________________________________________________

ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

1 BEFORE STARTING OPERATION

This section provides guidelines for turning-up the Digivance system, verifying that all units are operating properly, testing to ensure that all performance requirements are satisfied, and correcting any installation problems. This process assumes that the various units have been installed in accordance with the system design plan.

1.1 Tools and Materials

The following tools and materials are required in order to complete the procedures in this section:

• Portable spectrum analyzer or RF power meter

• DC voltmeter

• External RF and optical attenuators (if specified in system design plan)

• PC-type computer with Digivance Element Management System (EMS) Version 3.01 software installed

• Straight-through RS-232 DB-9 interface cable (accessory)

•Handset

•Pencil or pen

• Writing pad

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

1.2 Readiness Check

Before starting the turn-up process, inspect the complete Digivance system to verify that all components of the system are ready to be powered-up. This will ensure that no units of the system will be damaged during turn-up and that all existing systems will continue to function properly.

1.2.1 Host Unit Installation Checks

Complete the following checks at the HU prior to starting the turn-up process:

1. Verify that the ON/OFF switch on the HU is in the OFF position (press O).

Note: When connecting the equipment to the supply circuit, be sure to check equipment nameplate ratings to avoid overloading circuits which may cause damage to over-current protection devices and supply wiring.

2. At the fuse panel, install a 3 Amp GMT fuse in the circuit that supplies DC power to the HU.

3. Using a DC voltmeter, verify that the DC voltage level at the HU power terminals is between ± 21 to ± 60 VDC (nominal ± 24 or ± 48 VDC). The DC power provided to the HU can be either polarity.

4. Verify that all electrical and optical connections have been completed and that all optical fibers, coaxial cables, and wires are properly routed and secured.

1.2.2 Remote Unit Installation Checks

Complete the following checks at the RU prior to starting the turn-up process:

1. Verify that all electrical and optical connections have been completed and that all optical fibers, coaxial cables, and wires are properly routed and secured.

2. At the AC breaker box, make sure the circuit breaker for the circuit that supplies AC power to the RU is in the open (off) position.

2 TURN-UP SYSTEM AND VERIFY OPERATION

The process of turning-up the system and verifying operation involves powering up the various system components, verifying that the LED indicators show normal operation, setting the site number and name, adjusting the RF signal levels, and adjusting the path delay.

Note: SCS systems that include a dual-band RU are comprised of two systems that operate and function independently of each other. Each system can be independently turned-up, tested, and placed into service. The EMS will recognize each system regardless of the frequency/band and will display the appropriate screens. The frequency/band can be verified by clicking on the HOST Host tab and on the REMOTE STM tab. The frequency/ band for the selected system will be displayed on the right side of the screen.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

Each Digivance system must be turned-up separately before being networked together with multiple systems through the CAN interface. Use the following procedure to turn-up each Digivance system:

1. Temporarily disconnect the external alarm system or notify the alarm system provider that testing is in progress.

2. If the HU is networked together with multiple HU’s, temporarily disconnect the CAN cables from the NET IN and NET OUT ports of the HU.

Note: By default, all HU’s and RU’s are programmed with the same site number and name. This can cause problems for the EMS if multiple HU’s with the same site number and site name are networked together through the CAN interface. It is therefore necessary to temporarily disconnect the CAN interface cables from the HU when it is being configured for operation until a unique site number and name can be assigned.

3. Determine if the forward path composite input signal level at the host unit RF IN port(s) is appropriate to produce the required RF output signal level. Note that 800/900 MHz SMR host units have two forward path RF ports. Adjust by installing an external attenuator if necessary. For 800/900 MHz SMR systems., the optimum input signal level is –20 dBm Refer to Section 2.1 for the calculation and adjustment procedure.

4. At the HU: Place the ON/OFF switch on the HU in the ON position (press I).

5. At the RU: Place the AC circuit breaker switch in the closed (ON) position.

6. Wait 6 to 10 seconds for the HU and the RU to initialize and then observe the LED indicators on the HU and RU. Refer to Section 4: Maintenance for the troubleshooting procedures if the indicators do not respond as specified in Table 3- 1.

Table 3-1. LED Indicator Operation at Initial Turn-Up

REAR ACCESS HOST UNIT FRONT ACCESS HOST UNIT REMOTE UNIT

POWER – Green POWER – Green

STANDBY – Off STANDBY – Off

HOST UNIT – Green HOST UNIT – Green

REMOTE UNIT – Green REMOTE UNIT – Green

DRIVE 851–869 – Green, Yellow, or Red DRIVE 935–940 – Green, Yellow, or Red

FWD/REV (PORT 1/PORT 2) – Green FWD/REV (PORT 1/PORT 2) – Green

DRIVE – Green, Yellow, or Red

STATUS – Off

Note: This LED will turn red for 6 to 10 seconds while the RU initializes and then turn off.

7. Measure the input optical power level at the HU and RU and verify that the optical power level received at the HU and RU is within –15 to –25 dBm. Refer to Section 4: Maintenance for the optical power test procedure.

8. Connect the EMS computer (if not already connected) to the SERVICE connector on the HU front panel. If necessary, a separate laptop computer loaded with the EMS software can be temporarily connected and used to initially configure the system.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

9. Start up the EMS software program. The EMS main window will open as shown in

Figure 3-1. The EMS software should be installed on a PC-type computer and the PC’s

COMM port should be configured to interface with the HU. For information about installing the EMS software and configuring the PC’s COMM port, refer to the Digivance Element Management System User Manual (see Related Publications section).

Click to view drop down menu

Figure 3-1. Digivance Element Management System Main Window

10. Open the View drop down menu and connect to the Host and Remote pair by selecting the “NotNamed/NotNamed” Host/Remote pair. The HOST Alarms display and the REMOTE Alarms display will open within the main window as shown in Figure 3-2.

Host/Remote pair site name

Clicking on the tabs in this list will open the corresponding display.

Page 3-4

Figure 3-2. Typical Host and Remote Alarms Display

ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

11. New Control program software and FPGA program software will be provided separately on a “as needed” basis. If new Control and FPGA software is not provided with the system, proceed to step 12. If a Control and FPGA software upgrade is required, contact the ADC Technical Assistance Center (see Section 5) for help with the download procedure.

12. Click on the HOST Config tab and on the REMOTE Config tab (see Figure 3-2). The HOST Config display and the REMOTE Config display will open within the main window.

13. Enter the Site Name and Site Number for both the HOST and the REMOTE unit. Refer to

Section 2.2 for details.

Note: The Site Name and Site Number must be unique for each Digivance system.

14. If the Digivance system will be networked together with other Digivance systems, reconnect the CAN cables to the HU’s NET IN and NET OUT ports.

15. Verify that no Major or Minor alarms are being reported in either the HOST or REMOTE

Alarm displays (except as indicated in the note below) and that all alarm fields are green.

Note: The Host RF Underdrive may indicate a minor alarm until the Host Fwd Att and

Remote Fwd Att values are set.

16. Click on the HOST RF tab (see Figure 3-2). The HOST RF display will open within the main window.

17. Enter the Host Fwd Att (Forward Attenuation) value. This sets the forward input RF signal level at the HU. Refer to Section 2.3 for details. By default, this value is set to 31 dB. If the DRIVE LED on the HU front panel was red, it should turn green when this step is completed. Note that 800/900 MHz SMR HU’s have two DRIVE LED’s.

18. Determine if the RF output power at the RU ANTENNA is at the correct level up to a composite maximum of +38.1 dBm (6.5 Watts) for 800/900 MHz SMR systems, +38.5 dBm (7.0 Watts) for 800 MHz systems, and +37.7 dBm (5.9 Watts) for 1900 MHz systems. Refer to Section 2.4 for details.

19. Click on the REMOTE RF tab (see Figure 3-2). The REMOTE RF display will open within the main window.

20. Enter the Remote Fwd Att value. This adjusts the RF output signal level at the HU ANTENNA port. By default this value is set to 31 dB. Refer to Section 2.5 for details.

21. Click on the HOST RF tab (see Figure 3-2). The HOST RF display will open within the main window.

22. Enter the Host Rev Att (Reverse Attenuation) values. This sets the reverse output RF signal levels at the host unit RF OUT port(s). By default each value is set to 31 dB. Refer to Section 2.6 for details. Note that 800/900 MHz SMR host units have two REVERSE RF OUT ports.

23. If a delay adjustment is required, enter the Host Fwd Delay and Host Rev Delay values. By default, the delay values are set to 0. Refer to Section 2.7 for details.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

24. If a separate laptop computer loaded with the EMS software was used to initially configure the system, disconnect the laptop computer from the SERVICE connector.

Note: When two or more HU’s are connected together through the CAN interface, only one EMS computer is required to manage the networked Digivance systems. The EMS computer may be connected to the SERVICE port on any one of the HUs in the network.

25. Reconnect the external alarm system or notify the alarm system provider that the turn-up process has been completed.

2.1 Reference Procedure: Determine Forward Path Input Signal Level

The level of the composite RF input signals received at the host unit FORWARD RF IN port(s) will vary depending on the EBTS, the cable loss, the number of channels present, and the required forward path composite power. If maximum composite RF output is required at the RU, the level of the composite RF input signal received at the HU must fall within a range of –9 to –40 dBm. If the signal level is not within this range, it must be adjusted using an external attenuator. Note that the 800/900 MHz SMR host unit has two FORWARD RF IN ports. Use the 851–869 FORWARD RF IN port to complete this procedure. Then repeat this procedure for the 935–940 FORWARD RF IN port.

Note: The optimum level for an 800/900 MHz SMR composite input signal is –20 dBm

If using the Conditioning Panel or Duplexing Panel, refer to the user manual shipped with the panel (ADCP-75-147) for the procedures for measuring and adjusting the RF input signal level at the HU. If connecting a single HU to a single EBTS, use the following procedure to measure and adjust the input RF signal level at the HU:

1. Connect a spectrum analyzer or power meter to the forward path output port at the EBTS.

The required signal levels and test points for 800/900 MHz SMR systems are shown in

Figure 3-3. The required signal levels and test points for 800 MHz and 1900 MHz

systems are shown in Figure 3-4. Note that 800/900 MHz SMR Host Units have two forward path ports.

Note: Check the input rating of the test equipment and the output rating of the EBTS. To avoid burning out the spectrum analyzer or power meter, it may be necessary to insert a 30 dB 100W (or similar) attenuator between the EBTS and test equipment.

2. If using a spectrum analyzer, proceed to step 3. If using a power meter, measure the composite signal power from the EBTS and then proceed to step 5.

3. Measure the RF level of a single carrier, such as the control channel, in dBm. Make sure the resolution bandwidth of the spectrum analyzer is 30 kHz. Maximum power in any channel should not exceed 5W (+37 dB).

4. Calculate the total composite signal power from the EBTS using the following formula:

= Pc + 10Log N where,

tot

is the total composite power in dBm

tot

is the power per carrier in dBm as measured in step 3, and

N is the total number of channels.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

ENHANCED BASE TRANSCEIVER STATION

RECEIVER

REVERSE PATH OUTPUT SIGNAL LEVEL AS SET BY HOST REVERSE PATH ATTENUATORS

HOST UNIT

806-824

ATTENUATORS

(HOST REV ATT)

RECEIVER

0 to 31 dB

896-901

AND CONTROL

OPTICAL LINK

851-869 TRANSMITTER

RF, OPTICS,

935-940 TRANSMITTER

EXTERNAL

ATTENUATORS

0 to 31 dB

ATTENUATORS

(HOST FWD ATT)

FORWARD PATH

INPUT SIGNAL LEVEL

AT HOST UNIT

(-20 dBm OPTIMAL

COMPOSITE FOR

FULL POWER)

FORWARD PATH SIGNAL

LEVEL AS SET BY HOST

FORWARD PATH

ATTENUATORS

(ADJUST TO -40 dBm

COMPOSITE

FOR FULL POWER)

RF, OPTICS,

AND CONTROL

0 to 31 dB

ATTENUATORS

REMOTE UNIT

MAXIMUM OUTPUT SIGNAL

LEVEL AT ANTENNA PORT

(38.1 dBm AT FULL POWER)

(REMOTE FWD ATT)

LPA

QUADRAPLEXER/FILTER

FORWARD PATH SIGNAL

LEVEL AS SET BY REMOTE

FORWARD PATH

ATTENUATORS

ANTENNA

Figure 3-3. Signal Levels, Test Points, and Adjustments for 800/900 MHz SMR Systems

20577-A

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

ENHANCED BASE TRANSCEIVER STATION

REVERSE PATH OUTPUT

SIGNAL LEVEL AS SET BY HOST

REVERSE PATH ATTENUATOR

RECEIVER

HOST UNIT

0 to 31 dB

ATTENUATOR

(HOST REV ATT)

RF, OPTICS,

AND CONTROL

OPTICAL LINK

REMOTE UNIT

TRANSMITTER

ATTENUATOR

0 to 31 dB

ATTENUATOR

(HOST FWD ATT)

EXTERNAL

FORWARD PATH

INPUT SIGNAL LEVEL

AT HOST UNIT

(-20 dBm TYPICAL

COMPOSITE FOR

FULL POWER)

FORWARD PATH SIGNAL

LEVEL AS SET BY HOST

FORWARD PATH ATTENUATOR

(ADJUST TO -40 dBm

COMPOSITE FOR

FULL POWER)

RF, OPTICS,

AND CONTROL

MAXIMUM OUTPUT SIGNAL

LEVEL AT ANTENNA PORT

AT FULL POWER

38.5 dB FOR 800 MHZ

37.7 FOR 1900 MHZ

0 to 31 dB

ATTENUATOR

(REMOTE FWD ATT)

LPA

DUPLEXER

FORWARD PATH SIGNAL

LEVEL AS SET BY REMOTE

FORWARD PATH

ATTENUATOR

PRIMARY

ANTENNA

20653-A

Figure 3-4. Signal Levels, Test Points, and Adjustments for 800 MHz and 1900 MHz Systems

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

5. Determine the total cable loss that is imposed by the forward path coaxial cable that links

the EBTS to the HU and also any insertion loss imposed by splitters or combiners.

6. Subtract the total cable loss and any insertion losses from the total composite power

calculated in step 4.

7. Subtract –20 (optimum input signal level) from the value determined in step 6. The

difference (which should be positive) equals the value of the external attenuator that is required to reduce the forward path signal level to the optimum level for input to the HU. The following formula outlines the required calculations for steps 6 and 7:

– (Cable and insertion loss) – (–20) = Value of external attenuator required

tot

Note: If the input signal level is already –20 dBm, no external attenuator is required.

8. Select an attenuator that is as close to the value calculated in step 7 as possible.

9. Install the external attenuator in the coaxial cable that is connected to the corresponding

FORWARD RF IN port at the HU.

Caution: The Host Unit can be damaged if it is overdriven by the EBTS. Always install an

external protective attenuator at the Host Unit FWD RF IN port if the forward path composite input signal level is greater than –9 dBm.

10. If turning up an 800/900 MHz SMR system, repeat steps 1–9 for the 935–940 FORWARD RF IN port at the HU. Install the external attenuator in the coaxial cable that is connected to the 935–940 FORWARD RF IN port at the HU.

11. Subtract the value of the external attenuator from the total composite signal power (P and record the result. This value will be required when setting the attenuation of the HU’s internal forward path attenuators.

2.2 Reference Procedure: Enter Site Name and Site Number

All HU’s and RU’s are programmed with the same site name and site number. It is therefore necessary to assign a unique site name and site number to the HU and RU before they can be connected to the same CAN network. Use the following procedure to assign a unique site name and number to each HU and RU system:

1. Click on the HOST Config tab and on the REMOTE Config tab. The HOST Config display and the REMOTE Config display will open within the EMS main window as shown in Figure 3-5.

2. Click on the HOST Site Name Edit button (see Figure 3-5). The Site Name pop-up screen will open as shown in Figure 3-6. Enter a unique name for the HOST. The name may be up to 32 characters long and must not contain any spaces. The name may include numbers, punctuation, and upper or lower case letters and must always begin with a letter. Click on OK to close the screen and make the changes take effect.

tot

)

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

Click on the Edit button to open pop-up screen

HOST Site Number

HOST Site Name

REMOTE Site Number (Entered automatically when the HOST site number is selected)

REMOTE Site Name

Figure 3-5. HOST and REMOTE Config Displays

Figure 3-6. HOST Site Name Pop-Up Screen

3. Click on the HOST Site Number Edit button (see Figure 3-5). The Site Number pop-up

screen will open. Enter any number (must be unique) between 1 and 24 and then click on OK to close the screen and make the changes take effect.

4. Check the REMOTE Site Number field (see Figure 3-5). The REMOTE Site Number

does not have to be entered. When the HOST Site Number is entered, the system will automatically enter the same number for the REMOTE Site Number.

5. Click on the REMOTE Site Name Edit button (see Figure 3-5). The Site Name pop-up

screen will open. Enter a unique name for the REMOTE. The name may be up to 32 characters long and must not contain any spaces. The name may include numbers, punctuation, and upper or lower case letters and must always begin with a letter. Click on OK to close the screen and make the changes take effect.

6. Open the Tools menu at the top of the main window and then select Refresh Catalog to make the new Host and Remote site names appear in the View menu.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

2.3 Reference Procedure: Enter Host Forward Attenuation

The HU internal forward path attenuator setting determines the maximum composite output signal level at the RU antenna port. The appropriate attenuation value for any particular system is based on the number of channels the system is transporting and the signal level of the composite forward path signals input at the host units RF IN ports. By default, the forward path attenuator is set to 31 dB.

The maximum output power is 38.1 dBm (6.5 Watts) for 800/900 MHz SMR systems, 38.5 dBm (7.0 Watts) for 800 MHz systems, and 37.7 dBm (5.9 Watts) for 1900 MHz systems. The total forward path gain that is provided by the system (with host and remote forward attenuators set to 0 dB) is 78.1 dBm for 800/900 MHz SMR systems, 78.5 dBm for 800 MHz systems, and 77.7 for 1900 MHz systems. For 800/900 MHz SMR systems, this procedure sets the attenuation for both FORWARD RF IN ports.

Use the following procedure to set the forward path attenuation to provide the maximum composite output signal level:

1. Click on the HOST RF tab. The HOST RF display will open within the EMS main

window as shown in Figure 3-7.

Click on Edit button to open Host Fwd Att pop-up screen

Figure 3-7. Typical HOST RF Display

2. Click on the Host Fwd Att Edit button (see Figure 3-7). The Host Fwd Att pop-up screen

will open as shown in Figure 3-8.

3. Obtain the value of the total composite input signal level as determined in step 11 of

Section 2.1.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

Figure 3-8. Host Fwd Att Pop-Up Screen

4. Determine the appropriate value to enter for the Host forward path attenuator by subtracting the required system output level (per system design plan) from the system gain (78.1 dB for 800/900 MHz SMR, 78.5 for 800 MHz, and 77.7 dB for 1900 MHz) and then adding the composite input signal level. The result (see sample calculation) is the amount of attenuation required.

Atten = (System Gain) – (Required System Output Power) + (Composite Input Power)

5. Enter the attenuation value and click OK to close the pop-up screen and to make the changes take effect.

2.4 Reference Procedure: Determine Output Signal Level at RU Antenna Port

The RF output signal level should be measured at the RU ANTENNA port to verify that the composite signal level is at the expected level. Use the following procedure to determine the power level:

Note: The RF output signal level measured in this procedure should be approximately 31 dBm less than the output level specified for operation. This is because the factory default setting for the remote forward attenuator is 31 dB. The final adjustment of the system RF output signal level will be completed in Section 2.5

1. Place the AC circuit breaker switch (at the RU power panel) in the open (OFF) position.

2. Disconnect the antenna cable from the RU ANTENNA port.

3. Connect a spectrum analyzer or RF power meter to the HU ANTENNA port. (Check the input rating of the test equipment. Insert a 30 dB 100 W attenuator if necessary.)

4. Place the AC circuit breaker switch (at the RU power panel) in the closed (ON) position.

5. If using a spectrum analyzer, proceed to step 6. If using a power meter, measure the composite signal power from the RU and then proceed to step 8.

6. Measure the RF level of a single carrier, such as the control channel, in dBm. Make sure the resolution bandwidth of the spectrum analyzer is 30 kHz.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

7. Calculate the total composite signal power using the following formula:

= Pc + 10Log N

tot

Where,

is the total composite power in dBm

tot

is the power per carrier in dBm as measured in step 6, and

N is the total number of channels.

8. Record the result measured in step 5 or calculated in step 7.

9. Place the AC circuit breaker switch (at the RU power panel) in the open (OFF) position.

10. Disconnect the spectrum analyzer or RF power meter from the HU ANTENNA port.

11. Re-connect the antenna cable to the HU ANTENNA port.

Note: To comply with Maximum Permissible Exposure (MPE) requirements, the maximum composite output from the antenna cannot exceed 1000 Watts EIRP and the antenna must be permanently installed in a fixed location that provides at least 6 meters (20 feet) of separation from all persons.

12. Place the AC circuit breaker switch (at the RU power panel) in the closed (ON) position.

2.5 Reference Procedure: Enter Remote Forward Attenuation

The RU internal forward path attenuator setting is used to reduce the power level of the composite output signals at the RU. The maximum composite output signal level at the RU antenna port is set using both the HU forward attenuator (see Section 2.3) and the RU forward attenuator. Component variations may result in the output power at the HU antenna port being slightly above or below the calculated value. The RU forward attenuator is used in conjunction with the HU forward attenuator to add or remove attenuation to produce the required output signal level at the antenna port. The default setting for the RU forward attenuator is 31 dB. Use the following procedure to change the RU forward attenuation:

Caution: The RU may be destroyed if the maximum recommended output signal level at the RU antenna port is exceeded. Make sure that sufficient attenuation is inserted in the forward path to prevent the RU from being overdriven.

1. Click on the REMOTE RF tab. The REMOTE RF display will open within the EMS main

window as shown in Figure 3-9.

2. Check the level of the RF output signal (as determined in Section 2.4) against the system design plan specifications. The maximum output signal level permitted is 38.1 dBm (6.5 Watts) for 800/900 MHz SMR systems, 38.5 dBm (7.0 Watts) for 800 MHz systems, and

37.7 dBm (5.9 Watts) for 1900 MHz systems.

3. Determine if more or less attenuation is required to produce the required output signal level.

4. Click on the Remote Fwd Att field Edit button (see Figure 3-9). The Remote Fwd Att pop-up screen will open as shown in Figure 3-10.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

Click Edit button to

open the Remote Fwd

Att pop-up screen

RF output signal

level (± 3 dB)

Figure 3-9. Typical REMOTE LPA Display

5. Enter the required attenuation value and click OK to close the pop-up screen and to make the changes take effect.

6. Verify that the appropriate RF output signal level appears in the RF Output Power field (see Figure 3-9). This is primarily a reference value and should not take the place of external test equipment when determining the power level of the composite RF output signal. Depending on the modulation type and number of channels, the EMS software may report a power level that is higher or lower (± 3 dB) than the actual RF output signal.

Page 3-14

Figure 3-10. Remote Fwd Att Pop-Up Screen

ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

2.6 Reference Procedure: Enter Host Reverse Attenuation

The level of the RF signal that should be input to the EBTS will vary depending on the type of EBTS, the receive distribution, and the number of channels present. To interface with the EBTS, the reverse path signal level must be adjusted to provide the signal level required at the EBTS input port(s). The HU provides from –1 to +30 dB of gain in the reverse path. By default, the host reverse attenuator is set to –31 dB of attenuation which provides –1 dB of gain. Use the following procedure to set the reverse path gain:

1. Check the EBTS manufacturer’s specifications to determine the composite signal level required at the reverse path input port(s). Note that 800/900 MHz SMR host units have two reverse path input ports.

2. Determine the overall gain and loss imposed on the signal by the antenna, antenna cable, and by the cables that connect the HU to the EBTS.

3. Determine the amount of gain required to raise the reverse path signal to the level required at the EBTS.

4. Click on the HOST RF tab. The HOST RF display will open within the EMS main window as shown in Figure 3-11.

Click Edit button to

open the Host Rev Att

pop-up screen

Figure 3-11. Typical HOST RF Display

5. Click on the Host Rev Att field Edit button (see Figure 3-11). The Host Rev Att pop-up screen will open as shown in Figure 3-12.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

Figure 3-12. Host Rev Att Pop-Up Screen

6. Enter the attenuation value that will provide the required gain. Refer to Ta bl e 3-2 for the attenuation values and the corresponding gain (nominal) values.

7. Click OK to close the pop-up screen and to make the changes take effect.

Table 3-2. Reverse Path Attenuation Setting and Nominal Gain Provided

ATTENUATION

SETTING

GAIN

PROVIDED

ATTENUATION

SETTING

GAIN

PROVIDED

0 dB → 30 dB 11 dB → 19 dB 22 dB → 8 dB

1 dB 29 dB 12 dB 18 dB 23 dB 7 dB

2 dB 28 dB 13 dB 17 dB 24 dB 6 dB

3 dB 27 dB 14 dB 16 dB 25 dB 5 dB

4 dB 26 dB 15 dB 15 dB 26 dB 4 dB

5 dB 25 dB 16 dB 14 dB 27 dB 3 dB

6 dB 24 dB 17 dB 13 dB 28 dB 2 dB

7 dB 23 dB 18 dB 12 dB 29 dB 1 dB

8 dB 22 dB 19 dB 11 dB 30 dB 0 dB

9 dB 21 dB 20 dB 10 dB 31 dB –1 dB

10 dB 20 dB 21 9 dB

2.7 Reference Procedure: Enter Host Forward and Reverse Delay

The forward and reverse delay function allows entry of from 0 to 63 μsec of delay in the forward and reverse paths. This feature is used when multiple systems are used to transport the same channel and there is a significant difference in the path delay between systems. Additional delay may be entered to balance the overall system delay. The amount of delay required must be calculated by the RF engineer and should be included in the system design plan. The default setting is 0 μsec. Use the following procedure to change the forward and reverse path delay:

ATTENUATION

SETTING

GAIN

PROVIDED

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

1. Click on the HOST RF tab. The HOST RF display will open within the EMS main

window as shown in Figure 3-13.

Click Edit button to

open the Host Fwd

Delay pop-up screen

Click Edit button to

open the Host Rev

Delay pop-up screen

Figure 3-13. Typical HOST RF Display

2. Click on the Host Fwd Delay field Edit button (see Figure 3-13). The Host Fwd Delay

pop-up screen will open as shown in Figure 3-14.

Figure 3-14. Host Fwd Delay Pop-Up Screen

3. Obtain the value of the forward delay as specified in the system design plan. The delay is adjustable in 0.1 μsec steps.

4. Enter the forward path delay value and click OK to close the pop-up screen and to make the changes take effect.

5. Repeat the process for reverse delay by right-clicking on the appropriate delay section (see

Figure 3-13) and then entering the required delay value in the pop-up screen.

6. Click OK to close each pop-up screen and to make the changes take effect.

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ADCP-75-187 • Issue 3 • September 2006 • Section 3: OPERATION

Blank

Page 3-18

SECTION 4: MAINTENANCE

Content Page

1 SYSTEM MAINTENANCE OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

1.1 Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

2 FAULT DETECTION AND ALARM REPORTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

3 FAULT ISOLATION AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

3.1 Host Unit Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

3.2 RU Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

4 TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

4.1 Optical Power Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

4.2 Optical Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

5 SCHEDULED MAINTENANCE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

_________________________________________________________________________________________________________

1 SYSTEM MAINTENANCE OVERVIEW

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

This section explains the Digivance system fault detection and alarm reporting system, provides a method for isolating and troubleshooting faults, and provides test procedures. The Digivance system requires minimal regular maintenance to insure continuous and satisfactory operation. The only components that require regular replacement are the HU cooling fans.

Maintenance also includes diagnosing and correcting service problems as they occur. When an alarm is reported, it will be necessary to follow a systematic troubleshooting procedure to locate the problem. Once the source of the problem is isolated, the appropriate corrective action can be taken to restore service. The only internal components that can be replaced are the cooling fans that mount in the HU. The failure of any other internal component will require replacement of the entire unit.

1.1 Tools and Materials

The following tools and materials are required in order to complete the maintenance procedures specified in this section:

• IR filtering safety glasses

• Patch cords with SC connectors

• 15 dB in-line SC optical attenuators

• Optical power meter (1550 and 1310 nm)

Page 4-1

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

2 FAULT DETECTION AND ALARM REPORTING

The Digivance LRCS on-board embedded software detects various unit and system faults which generate either a Major or Minor alarm. A Major alarm indicates that the system has failed in a way that directly affects RF transport performance. When a major alarm occurs, all RF functions are disabled and the system is out of service. A Minor alarm means that system performance is not affected or in some cases, that the performance may no longer be optimal. When a minor alarm occurs, RF functions continue and the system remains in service.

The following means are used to report Major and Minor alarms:

• HU alarm contacts

• HU and RU LED’s

• EMS software Graphical User Interface (GUI)

• Network Operations Center - Network Element Manager (NOC/NEM) interface

• SNMP interface

The HU is equipped with a set of both normally open (NO) and normally closed (NC) alarm contacts which may be used to report both Major and Minor alarms to an external alarm system. The alarm contacts summarize the inputs so that any Major or Minor alarm will trigger an alarm report to the external alarm system.

The HU is equipped with multiple front panel LED indicators that show status and alarm information by displaying various colors: Green, Red, Yellow, and Off. The RU is equipped with a single LED indicator that shows status and alarm information by displaying either Red or Off. A detailed description of the Host Unit and Remote Unit LED indicators is provided respectively in Tabl e 4-1 and Tab le 4- 2.

The EMS software GUI provides both a summary and a detailed list of alarm information that includes unit and module level faults, circuit faults, and measured value faults such as voltages, RF power, and temperature. A summary showing a list of all systems and their current alarm status is presented through the Alarm OverView display. A more detailed list of alarm information is presented through the HOST alarm display and the REMOTE alarm display. The various fault conditions that trigger a major or minor alarm report are shown in the HOST and REMOTE alarm displays.

The NOC/NEM interface provides the same summary and detailed listing of alarm information as the EMS software GUI but in an ASCII text string format. Sending the command GET ALARMSUMMARY produces a list of all systems and their current alarm status. Sending the command GET ALARM ALL for a specific system will produce a detailed list of alarm information for the specified system.

The SNMP interface provides alarm information to up to ten SNMP managers which must be registered with the SNMP agent. The SNMP interface allows the SNMP managers to receive the alarm and status information generated by the host and remote units. The presentation of the alarm information is dependent on the features of the SNMP manager.

Page 4-2

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-1. Host Unit LED Indicators

INDICATOR COLOR DESCRIPTION

POWER

Green Off

Indicates if the HU is powered or un-powered.

The DC power source is on. The DC power source is off.

STANDBY

Indicates if the system is in the standby, normal, test, or program load mode.

Green (blinking) Yellow (blinking) Red (blinking) Off

HOST UNIT

The HU is in the standby mode. The HU is in the program load mode. The HU is in the test mode. The HU is in the normal mode.

Indicates if the HU is normal, over temperature, if an internal fault is detected, or if there is an equipment mismatch.

The HU is normal. The HU is over temperature or detects an internal fault. The HU detects an internal fault or HU/RU band mismatch.

Indicates if an alarm is detected at the RU.

No alarms detected at the RU. A minor alarm is detected at the RU. A major alarm is detected at the RU.

Indicates if the specified forward path RF signal level is normal, above overdrive threshold, or below underdrive threshold.

The RF signal level is normal The RF signal level is below the underdrive threshold. The RF signal level is above the overdrive threshold.

Indicates if the reverse path optical signals from the RU are normal, if optical signal errors are detected, or if the

REMOTE UNIT

DRIVE 851–869 DRIVE 935–940 (Rear Access HU)

DRIVE (Front Access HU)

FWD/REV (PORT 1/PORT 2)

Green Ye l lo w Red

optical signal is not detected.

Green Red

The reverse path optical signals are normal. Excessive errors (see Note) are detected in the reverse path optical signals or the HU is not receiving a reverse path optical

signal.

Note: Excessive errors means the Bit Error Rate (BER) has exceeded 10

–6

(1 bit error per million bits).

Table 4-2. Remote Unit LED Indicator

INDICATOR COLOR DESCRIPTION

STATUS

Indicates if the RU is unpowered, normal, if optical signal errors are detected, if the optical signal is not detected, or if an internal fault is detected.

Off

The RU is unpowered or the RU is normal and no faults are detected.

Red

The RU detects an internal fault, excessive errors (see Note) are detected in the forward path optical signals, or the RU is not receiving a forward path optical signal.

Note: Excessive errors means the Bit Error Rate (BER) has exceeded 10

–6

(1 bit error per million bits).

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ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

3 FAULT ISOLATION AND TROUBLESHOOTING

Alarm information may be accessed using the HU and RU LED indicators, the EMS software GUI, the NOC-NEM interface, or the SNMP manager. When an alarm occurs, use the unit LED indicator(s) and any one of the specified software tools to determine which Digivance system is affected, which unit (HU or RU) reported the alarm, and the fault that generated the alarm. Then refer to either Section 3.1 Host Unit Troubleshooting or Section 3.2 RU Troubleshooting to isolate the problem and to determine the corrective action required.

When attempting to isolate a problem, always determine the initial fault that generated the alarm report. Some faults may cause additional faults to be reported which tends to obscure the initial reason for the alarm. To help isolate faults, the EMS GUI provides an AlarmOverview screen, shown in Figure 4-1, that indicates which Digivance system/unit is reporting the alarm.

Click to acknowledge alarm and to open Alarm History Info dialog box

Click to clear alarm history fault indicator and to close Alarm History Info dialog box

Figure 4-1. AlarmOverView Screen

The AlarmOverview screen includes an ALARM HIST indicator which the user should click to acknowledge that an alarm exists. Acknowledging the alarm opens the Alarm History Info dialog box (also shown in Figure 4-1) which directs the user to view the EMS Log file for details. The EMS Log file lists the various faults in the order in which they occurred. Clear each fault starting with the initial fault. In most instances, clearing the initial fault will also clear any remaining faults. For additional information on using the AlarmOverview screen, refer to the Digivance Element Management System User Manual (see Related Publications section).

Note: It is recommended that if there are alarms at both the HU and RU, the optical faults should be checked and cleared first. Because the HU and RU function as a system, a fault in the fiber optic link will cause alarms to be reported by both the HU and RU.

Page 4-4

3.1 Host Unit Troubleshooting

Use this section to troubleshoot alarms that originate with the Host Unit. When a Minor alarm occurs, one (or more) of the Host Unit LED’s will turn yellow and the EMS software will indicate a minor fault/alarm. When a Major alarm occurs, one (or more) of the Host Unit LED’s will turn red and the EMS software will report a major fault/alarm. Locate the LED and the corresponding software fault/status indicator in Tab le 4 -3 and then take the corrective action indicated.

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-3. Host Unit Fault/Alarm Isolation Diagram

Host Unit Front Panel LED

Power

Standby

Host Unit

Remote

Unit

Green - Powered

Off - Not powered

Green blinking - Standby

Yellow blinking Program load

Red blinking - Test

Off - Normal

Green - Normal

Yellow - Minor Alarm

Red - Major Alarm

Green - Normal

Yellow - Minor Alarm at Remote Unit - See Table 4-5. Remote Unit Fault/Alarm Isolation Diagram

Red - Major Alarm at Remote Unit - See Table 4-5. Remote Unit Fault/Alarm Isolation Diagram

Software Fault/Status Indicator

No specific HU faults - Only faults with no associated LED are displayed

Oper Mode - Operational mode of system

Temperature - Over temperature

Fwd Synth Lock - Forward synthesizer out of lock

LO Synth Lock - Local oscillator synthesizer out of lock

Pri Rev Synth Lock - Reverse primary synthesizer out of lock

8 Volt - Onboard 8 Volt power supply below threshold

3.8 Volt - Onboard 3.8 Volt power supply below threshold

Pri Fwd Mux Lock - Forward primary phase locked loop out-of-lock

Pri Laser Fail - Forward primary laser failure

Hardware mismatch - Host and Remote band mismatch

Reverse Link Fault

Corrective Action

or Reference

Table 4-4

Problem A

Use EMS to

change system to

required mode

Table 4-4

Problem B

Replace HU

Replace HU or

RU with

correct unit

Table 4-4 Problem G

Continued

20013-B

Page 4-5

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-3. Host Unit Fault/Alarm Isolation Diagram, continued

Host Unit Front Panel LED Software Fault/Status Indicator Corrective Action

Green - Normal

Drive

(FRONT

ACCESS)

Drive

851-869

(REAR

ACCESS)

Fwd/Rev

(Port 1/Port 2)

Drive

935-940

(REAR

ACCESS)

No Associated LED

Yellow - Minor Alarm

Red - Major Alarm

Green - Normal

Yellow - Minor Alarm

Red - Major Alarm

Green - Normal

Red - Major Alarm

Green - Normal

Yellow - Minor Alarm

Red - Major Alarm

RF Underdrive - Forward path RF signal level too low

RF Overdrive - Forward path RF signal level too high

RF Underdrive 800 MHz - 800 MHz forward path RF signal level too low

RF Overdrive 800 MHz - 800 MHz forward path RF signal level too high

Pri Rx Light - No light received over optical reverse path

Pri Rx Errors - Excessive errors received over optical reverse path

RF Underdrive 900 MHz - 900 MHz forward path RF signal level too low

RF Overdrive 900 MHz - 900 MHz forward path RF signal level too high

Minor Contact Output - Minor alarm reported by HU or STM

Major Contact Output - Major alarm reported by HU or STM

Remote Lost - The HU cannot communicate with remote (STM)

EMS Link Status - The EMS cannot communicate with HU

or Reference

Table 4-4

Problem C

Table 4-4

Problem D

Table 4-4

Problem C

Table 4-4

Problem D

See Table 4-4

Problem E

See Table 4-4

Problem E

Table 4-4

Problem C

Table 4-4

Problem D

See specific

fault indicator

See specific fault indiator

See Table 4-4

Problem E

See Table 4-4

Problem F

20583-A

PROBLEM A: The HU is not powered.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The HU is turned off.

2. The fuse is open/removed from the fuse panel or the DC power has failed.

PROBLEM B: The HU is overheating.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Air intake or exhaust opening to HU chassis is blocked

2. Ambient temperature > 50º C/122º F.

3. Faulty fan.

4. The HU has failed.

Page 4-6

Table 4-4. Host Unit Fault/Alarm Corrective Action

1. Place On/Off switch in the On position.

2. Check DC power source, repair as needed, and replace or reinstall fuse at fuse panel.

1. Remove cause of air-flow blockage.

2. Reduce ambient temperature.

3. Replace HU fan (See applicable manual).

4. Replace HU.

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-4. Host Unit Fault/Alarm Corrective Action, continued

PROBLEM C: The RF input signal level is below the underdrive threshold.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Composite output signal from EBTS is too low.

1. Check EBTS composite output signal level and adjust if too low.

2. Faulty coaxial connection between the HU

2. Correct EBTS cables if faulty.

and the EBTS.

3. Incorrect attenuation in forward path RF coaxial link.

PROBLEM D: The RF input signal is above the overdrive threshold.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Composite output signal level from EBTS is too high.

2. Incorrect attenuation in forward path RF coaxial link.

PROBLEM E: No light received over the reverse path or excessive errors received over the reverse path

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Faulty reverse path optical fiber.

3. Check Host Forward Attenuator setting and adjust if attenuation is too high.

1. Check EBTS composite output signal level and adjust if too high.

2. Check Forward Attenuator setting and adjust if attenuation is too low.

1. Test optical fiber. Clean connector if dirty. Repair or replace optical fiber if faulty. (See Section 4.1).

2. Faulty optical transmit port at the RU; or faulty optical receive port at the HU

PROBLEM F: The HU does not respond to control or monitoring commands sent by the EMS.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The HU is not powered.

2. The cable connection between the HU and the

2. Test optical ports. Replace HU or RU if port is faulty (See Section 4.2).

1. See Problem A this table.

2. Inspect EMS cable and repair or replace if faulty.

EMS computer is faulty.

3. The CAN cable connections between the HUs in a multiple HU installation are faulty.

PROBLEM G: There is a loss of gain in either the primary or diversity reverse path of 10 dBm or greater.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The HU has failed.

2. The RU has failed

3. Inspect each CAN cable and repair or replace if faulty.

1. Replace the HU.

2. Replace the RU.

3.2 RU Troubleshooting

Use this section to troubleshoot alarms that originate with the RU. When a Minor or Major alarm occurs, the RU STATUS LED will turn red and the EMS software will indicate a minor or major fault/alarm. Use the EMS software to identify the fault and then refer to Tab le 4 -5 to determine the corrective action required.

Page 4-7

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-5. Remote Unit Fault/Alarm Isolation Diagram

One LED, no designation

Remote Unit LED Software Fault/Status Indicator

Off - Not powered or Normal

No Response for Minor Alarm

Red - Major Alarm

Temperature - Over temperature

Converter - Power supply converter failure

LO Synth Lock - Local oscillator synthesizer out of lock

Fwd Synth Lock - Forward synthesizer out of lock

Pri Rev Synth Lock - Reverse primary synthesizer out of lock

Ref Synth Lock - Reference synthesizer out of lock

8 Volt - Onboard 8 Volt power supply below threshold

3.8 Volt - Onboard 3.8 Volt power supply below threshold

Pri Rev Mux Lock - Reverse primary phase locked loop out-of-lock

Pri Laser Fail - Reverse primary laser failure

LPA DC Fail - LPA power supply failure

LPA Loop Fail - LPA internal loop failure

LPA Low Power - LPA internal amplifier failure

LPA Temp - LPA over temperature

LPA Over Power - LPA signal level too high

LPA VSWR - The LPA VSWR is too high

System VSWR - The VSWR at the quadraplexer is too high

Pri Rx Light - No light received over optical forward path

Pri Errors - Excessive errors received over optical forward path

Hardware mismatch - Host and Remote band mismatch

Continued

Corrective Action

or Reference

See Table 4-6

Problem A

Replace RU

See Table 4-6

Problem A

See Table 4-6

Problem B

See Table 4-6

Problem C

See Table 4-6

Problem D

See Table 4-6

Problem E

See Table 4-6

Problem E

Replace HU or

RU with

correct unit

20584-B

Page 4-8

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-5. Remote Unit Fault/Alarm Isolation Diagram, continued

Remote Unit LED Software Fault/Status Indicator Corrective Action

Host Lost - The STM cannot communicate with Host (HU)

EMS Link Status - The EMS cannot communicate with STM

No Associated LED

RF Power - No RF power detected at quadraplexer (STM)

LPA Disable - The LPA is shut down

Table 4-6. Remote Unit Fault/Alarm Corrective Action

PROBLEM A: The RU (STM or LPA) is overheating.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Debris preventing air from freely circulating

1. Remove cause of air-flow blockage.

around the RU aluminum enclosure.

2. Ambient temperature > 50º C/122º F.

3. The RU has failed.

PROBLEM B: The output power from the LPA exceeds the maximum rating.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The power level of the RF forward path composite input signal at the HU is too high.

2. Reduce ambient temperature.

3. Replace RU.

1. Check the power level of the RF composite input signal at the HU and adjust to correct level. To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode.

2. The RU (LPA) has failed.

PROBLEM C: The VSWR at the LPA exceeds the threshold setting of 3:1.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The antenna cable or antenna cable connectors are faulty.

2. Replace RU.

1. Inspect antenna cable and connectors and repair or replace as needed.To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode.

or Reference

See Table 4-6

Problem E

See Table 4-6

Problem F

See Table 4-6

Problem G

See Table 4-6

Problem H

20585-A

2. The antenna or antenna system is faulty.

3.The RU qudraplexer or LPA has failed.

2. Check the antenna circuit for shorts or opens (including lightning protector). To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode.

3. Replace RU.

Page 4-9

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

Table 4-6. Remote Unit Fault/Alarm Corrective Action, continued

PROBLEM D: The forward path VSWR is above threshold.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Faulty antenna or antenna system.

2. Faulty antenna cable.

3. The RU qudraplexer has failed.

PROBLEM E: No light received over the forward path or excessive errors received over the forward path

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. Faulty forward path optical fiber.

2. Faulty optical transmit port at the HU; or faulty optical receive port at the RU.

PROBLEM F: The RU does not respond to control or monitoring commands sent by the EMS.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The cable connection between the HU and the EMS computer is faulty.

PROBLEM G: No RF power is detected at the RU quadraplexer.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. No RF power is being input to the HU or the RF input signal level at the HU is too low.

2. The RU (LPA) is faulty.

PROBLEM H: The RF output form the RU (LPA) is shut down.

POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS

1. The LPA is in the forced shutdown mode.

2. The RU (LPA) is faulty.

1. Check the antenna system for shorts or opens (including lightning protector). To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode.

2. Check the antenna cable for faulty connections.

3. Replace the RU.

1. Test optical fiber. Clean connector if dirty. Repair or replace optical fiber if faulty. (See Section 4.1).

2. Test optical ports. Replace HU or RU if port is faulty (see Section 4.2).

1. Inspect EMS cable and repair or replace if faulty.

1. Check the RF input power level at the HU and adjust until within specifications.

2. Replace RU.

1. Check for fault conditions that will cause a major alarm. Correct faults as required. To reset, use EMS to place Digivance system in standby mode and then place system back in normal mode

2. Replace RU.

Page 4-10

4 TEST PROCEDURES

This section provides procedures for common troubleshooting and maintenance tests. Refer to these procedures as needed when specified in the Fault/Alarm Isolation Diagrams in Section 3.

4.1 Optical Power Test

A break in an optical fiber or a fault with the optical connector will interrupt communications between linked components or generate excessive errors. Use the following procedure to isolate a problem with an optical fiber or connector.

Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transmitter of any unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transmitter or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the connector.

1. Put on the IR filtering safety glasses.

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

2. Notify the NOC or alarm monitoring system operator that the system is going offline.

3. At the HU, place the On/Off switch in the OFF position (press O). At the RU, place the AC circuit breaker switch in the open (OFF) position.

Note: Turning off the HU and RU disables the respective lasers which is necessary in order to safely inspect and clean the optical connectors.

4. Disconnect the optical fiber connectors for the fiber to be tested at the HU and the RU.

5. Inspect the optical connectors. Verify that connectors are clean and that no scratches or imperfections are visible on the fiber end. Clean and polish the optical connectors if necessary.

6. Connect the optical power meter to the output (receiver) end of the optical fiber as shown in Figure 4-2. If an attenuator was included in the fiber link, make sure it is installed.

HOST UNIT

FWD

(PORT 1)

OPTICAL POWER

METER

REV

(PORT 2)

WDM

FORWARD PATH OPTICAL FIBER

REVERSE PATH

OPTICAL FIBER TEST SET UP

TEST SET UP

FWD/REV PATH OPTICAL FIBER

ATTENUATOR

(IF USED)

BAND 2 BAND 1

OPTICAL POWER

METER

-15 TO -25 dBm

REMOTE UNIT

-15 TO -25 dBm

ATTENUATOR

WDM

(IF USED)

FWD/REV PATH OPTICAL FIBER

BAND 1 = LOWER FREQUENCY SYSTEM BAND 2 = HIGHER FREQUENCY SYSTEM

Figure 4-2. Forward and Reverse Path Optical Fiber Test Set Up

20979-A

Page 4-11

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

7. Connect the input (transmitter) end of the optical fiber to the transmitting HU or RU.

8. If the transmitting unit is the HU, place the On/Off switch in the ON position (press I). If

the transmitting unit is the RU, close (turn on) the AC circuit breaker switch.

9. Using the transmitting HU or RU as an optical light source, measure the optical power at the receiver end of the optical fiber. The power level of the optical signal received at the HU or RU should be –15 to –25 dBm (with attenuator installed). If the power level of the received optical signal is within this range, the optical fiber and the far end unit are good. If the power level of the signal is greater than –15 dBm, insert additional attenuation to bring the signal level within the specified range. If the power level is less than –25 dBm, the value of the external attenuator is too high, the optical fiber is faulty, or the far end unit optical transmitter is faulty. Continue with test procedure to isolate the problem

Caution: Erratic operation may occur with an optical input signal level of –13 dBm or higher. If the optical input signal level exceeds –9 dBm, the optical receiver may be damaged.

10. If the transmitting unit is the HU, place the On/Off switch in the OFF position (press O).

If the transmitting unit is the RU, open (turn off) the AC circuit breaker switch.

11. Disconnect the optical power meter from the receiver end of the optical fiber.

12. Use a 1 meter patch cord to connect the optical power meter to the transmitting HU or

RU as shown in Figure 4-3.

HOST UNIT

FWD

(PORT 1)

OPTICAL POWER

METER

+1.3 +/- 1 dBm

Figure 4-3. Host Unit and Remote Unit Optical Transmitter Test Set Up

HOST UNIT OPTICAL TRANSMITTER

REV

(PORT 2)

REMOTE UNIT OPTICAL TRANSMITTER

1 METER PATCH CORD

TEST SET UP

1 METER PATCH CORD

TEST SET UP

OPTICAL POWER

METER

0 +/- 1 dBm

REMOTE UNIT

BAND 2 BAND 1

20980-A

BAND 1 = LOWER FREQUENCY SYSTEM BAND 2 = HIGHER FREQUENCY SYSTEM

13. If the transmitting unit is the HU, place the On/Off switch in the ON position (press I). If

the transmitting unit is the RU, close (turn on) the AC circuit breaker switch.

14. Measure the optical output power of the transmitting HU or RU. The power level of the

optical output signal from the HU or RU must meet the following specification:

Forward Path Signal at the HU: 0 +

Reverse Path Signal at the RU: +1.3 +

If the power level of the optical output signal is within specifications with a 1 meter patch cord installed, the fiber optic link is faulty. If the power level of the optical signal is not within specifications, the far end HU or RU optical transmitter is faulty.

Page 4-12

1 dBm

15. If the transmitting unit is the HU, place the On/Off switch in the OFF position (press O).

If the transmitting unit is the RU, open (turn off) the AC circuit breaker switch.

16. Disconnect the optical power meter from the receiver end of the optical fiber.

17. Reconnect the optical fibers to the receiving HU or RU.

18. Repeat steps 3 through 17 for each optical fiber that requires testing.

19. When ready to put the system back into service, place the On/Off switch on the HU in the

ON position (press I) and close (turn on) the AC circuit breaker switch for the RU.

20. Notify the NOC or alarm monitoring service that the system is going back online.

4.2 Optical Loopback Test

The following procedure provides a test to determine if an optical port fault exists with the Host Unit.

Note: Because the RU is equipped with a WDM, the optical loopback test cannot be performed on the RU.

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

1. Put on the IR filtering safety glasses.

2. Notify the NOC or alarm monitoring system operator that the system is going offline.

3. Place the On/Off switch in the OFF position (press O).

4. Disconnect the optical fiber connectors from the FWD (PORT 1) and REV (PORT 2) optical ports and place a dust cap over each connector.

5. Plug a 15 dB in-line optical attenuator into the FWD (PORT 1) optical port as shown in

Figure 4-4.

Caution: The optical receiver can be damaged if the power level of the optical input signal is too high. To avoid damaging the optical receiver when performing the loopback test, always install a 15 dB in-line attenuator in the optical receiver circuit.

6. Connect a 1 meter patch cord between the optical attenuator and the REV (PORT 2) optical port.

7. Place the On/Off switch in the ON position (press I).

Page 4-13

ADCP-75-187 • Issue 3 • September 2006 • Section 4: MAINTENANCE

HOST UNIT

FWD

(PORT 1)

15 dB

ATTENUATOR

1 METER PATCH CORD

REV

(PORT 2)

20019-C

Figure 4-4. Host Unit Loopback Test

8. Observe the FWD/REV (PORT 1/PORT 2) LED indicator which will turn either red or green. If the LED turns red, either the FWD (PORT 1) optical transmitter or the REV (PORT 2) receiver is faulty. If the LED turns green, both the FWD (PORT 1) and the REV (PORT 2) optical ports are good.

9. Place the On/Off switch in the OFF position (press O).

10. Remove the dust caps from the optical fiber connectors.

11. Clean each connector (follow connector supplier’s recommendations) and then insert each connector into the appropriate optical port.

12. When ready to put the HU back into service, place the On/Off switch in the ON position (press I).

13. Notify the NOC or alarm monitoring service that the system is going back online.

5 SCHEDULED MAINTENANCE REQUIREMENTS

The only scheduled maintenance required for the SCS system is to remove and replace the HU cooling fans. This should be done at 60 month intervals. Refer to the applicable Digivance LRCS Host Unit Installation and Maintenance Manual (See Related Publications section) for the procedure.

Page 4-14

SECTION 5: GENERAL INFORMATION

Content Page

1 WARRANTY/SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

2 SOFTWARE SERVICE AGREEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

3 REPAIR/EXCHANGE POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

4 REPAIR CHARGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

5 REPLACEMENT/SPARE PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

6 RETURNED MATERIAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

7 CUSTOMER INFORMATION AND ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3

_________________________________________________________________________________________________________

1 WARRANTY/SOFTWARE

The Product and Software warranty policy and warranty period for all ADC Products is published in ADC’s Warranty/Software Handbook. Contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada) for warranty or software information or for a copy of the Warranty/Software Handbook.

ADCP-75-187 • Issue 3 • September 2006 • Section 5: GENERAL INFORMATION

2 SOFTWARE SERVICE AGREEMENT

ADC software service agreements for some ADC Products are available at a nominal fee. Contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada) for software service agreement information.

3 REPAIR/EXCHANGE POLICY

All repairs of ADC Products must be done by ADC or an authorized representative. Any attempt to repair or modify ADC Products without written authorization from ADC voids the warranty.

If a malfunction cannot be resolved by the normal troubleshooting procedures, call the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada). A telephone consultation can sometimes resolve a problem without the need to repair or replace the ADC Product.

If, during a telephone consultation, ADC determines the ADC Product needs repair, ADC will authorize the return of the affected Product for repair and provide a Return Material Authorization number and complete return shipping instructions. If time is critical, ADC can arrange to ship the replacement Product immediately. In all cases, the defective Product must be carefully packaged and returned to ADC.

Page 5-1

ADCP-75-187 • Issue 3 • September 2006 • Section 5: GENERAL INFORMATION

4 REPAIR CHARGES

If the defect and the necessary repairs are covered by the warranty, and the applicable warranty period has not expired, the Buyer’s only payment obligation is to pay the shipping cost to return the defective Product. ADC will repair or replace the Product at no charge and pay the return shipping charges.

Otherwise, ADC will charge a percentage of the current Customer Product price for the repair or NTF (No Trouble Found). If an advance replacement is requested, the full price of a new unit will be charged initially. Upon receipt of the defective Product, ADC will credit Buyer with 20 percent of full price charged for any Product to be Out-of-Warranty. Products must be returned within thirty (30) days to be eligible for any advance replacement credit. If repairs necessitate a visit by an ADC representative, ADC will charge the current price of a field visit plus round trip transportation charges from Minneapolis to the Buyer’s site.

5 REPLACEMENT/SPARE PRODUCTS

Replacement parts, including, but not limited to, button caps and lenses, lamps, fuses, and patch cords, are available from ADC on a special order basis. Contact the Technical Assistance Center at 1-800-366-3891, extension 73476 (in U.S.A. or Canada) or 952-917-3476 (outside U.S.A. and Canada) for additional information.

Spare Products and accessories can be purchased from ADC. Contact Sales Administration at 1-800-366-3891, extension 73000 (in U.S.A. or Canada) or 1-952-938-8080 (outside U.S.A. and Canada) for a price quote and to place your order.

6 RETURNED MATERIAL

Contact the ADC Product Return Department at 1-800-366-3891, extension 73748 (in U.S.A. or Canada) or 952-917-3748 (outside U.S.A. and Canada) to obtain a Return Material Authorization number prior to returning an ADC Product.

All returned Products must have a Return Material Authorization (RMA) number clearly marked on the outside of the package. The Return Material Authorization number is valid for 90 days from authorization.

Page 5-2

ADCP-75-187 • Issue 3 • September 2006 • Section 5: GENERAL INFORMATION

7 CUSTOMER INFORMATION AND ASSISTANCE

PHONE:

U.S.A. OR CANADA

Sales: 1-800-366-3891 Extension 73000 Technical Assistance: 1-800-366-3891 Connectivity Extension 73475 Wireless Extension 73476

EUROPE

Sales Administration: +32-2-712-65 00 Technical Assistance: +32-2-712-65 42

EUROPEAN TOLL FREE NUMBERS

Germany: UK: Spain: France:

Italy: 0800 782374

ASIA/PACIFIC

Sales Administration: +65-6294-9948 Technical Assistance: +65-6393-0739

ELSEWHERE

Sales Administration: +1-952-938-8080 Technical Assistance: +1-952-917-3475

WRITE:

ADC TELECOMMUNICATIONS, INC PO BOX 1101, MINNEAPOLIS, MN 55440-1101, USA

0180 2232923 0800 960236 900 983291 0800 914032

ADC TELECOMMUNICATIONS (S'PORE) PTE. LTD. 100 BEACH ROAD, #18-01, SHAW TOWERS. SINGAPORE 189702.

ADC EUROPEAN CUSTOMER SERVICE, INC BELGICASTRAAT 2, 1930 ZAVENTEM, BELGIUM

PRODUCT INFORMATION AND TECHNICAL ASSISTANCE:

connectivity.tac@adc.com

wireless.tac@adc.com

euro.tac@adc.com

asiapacific.tac@adc.com

Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period. This publication may be verified at any time by contacting ADC's Technical Assistance Center.

13944-M

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