UBS Axcera 117B User Manual

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INSTRUCTION MANUAL

117B

20 WATT VHF HIGH BAND

TRANSLATOR

AXCERA, LLC

103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA

(724) 873-8100 • FAX (724) 873-8105

www.axcera.com • info@axcera.com

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117B 20 Watt VHF High Band Translator Table of Contents

Table of Contents

1. Introduction:

2. System – 117B: a. System Description

b. Specifications c. Installation Procedure d. System Check Out and Operation Procedure e. Switch Position and Status for Normal Operation f. System Alignment Procedure g. Remote Control Interface Connections h. Drawings:

1. Block Diagram

2. Interconnect

3. VHF Low Band Receiver Tray: a. Circuit Description

b. Detailed Alignment Procedure c. Drawings:

1. Block Diagram

2. Interconnect

4. 20 Watt VHF High Band Upconverter/Amplifier Tray: a. Circuit Description

b. Detailed Alignment Procedure c. Drawings:

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1175-1000

1175-3000 1175-8000

1265-3100 1265-8100

1. Block Diagram

2. Interconnect

5. Subassemblies:

Refer to the subassembly section for the schematics of the boards and subassemblies that make up the 117B. A drawing list showing the order in which the drawings appear in the subassembly section is found at the beginning of that section.

6. Maintenance and Harnesses:

This section contains information on proper operation and maintenance of the 117B.

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1174-3100 1174-8100

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117B 20 Watt VHF High Band Translator System Description

The 117B is a 20 Watt High Band VHF Television Translator which operates at a nominal Internally Diplexed output power of 20 Watts Peak Sync Visual with typically 2 Watts Aural at a -10 dB Aural/Visual Ratio.

Functionally, it is comprised of a VHF Low Band Receiver Tray (1265-1100) and a 20 Watt VHF High Band Upconverter/Amplifier Tray {1355-1010 (Low Band), 1355-1011 (Mid Band) or 1355-1012 (High Band)}.

The Receiver Tray receives the Low Band VHF Channel Input at Jack (J1) and converts it to an Internally Diplexed Visual + Aural IF Output (+0 dBm) at J4. The Visual + Aural IF output of the Receiver Tray at J4 is fed to J2 the IF Input Jack for the 20 Watt VHF High Band Upconverter/Amplifier Tray. The Upconverter Section of the Tray mixes the IF with an internally generated L.O. to produce the VHF High Band Channel Frequency Output. The signal is amplified and filtered in the Amplifier Section and directed to J4 the RF Output of the Tray. This output connects to the Antenna for your System.

Jack J7 located on the back of the Upconverter/Amplifier Tray is a 37 Position "D" Remote Interface Connector which provides the Operator with a connection for Remote Monitoring and Operation of the Translator.

This manual provides the Technical Specifications of the Translator, along with the Circuit Description, Alignment Procedure and the Schematics, Block Diagrams, Interconnects and Replacement Parts Lists necessary for the proper operation and maintenance of the 117B.

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VHF Solid State Transmitter / Translator

110A / 110B / 112B / 113B / 114B /

115A / 115B / 117B / 118B / 119B

■ Completely Solid State

■ Designed for unattended operation with

built-in remote control interface

■ Small size – ideal where space is limited

■ Class A amplification up to 20W for

excellent linearity

■ Extensive front panel status and metering

■ Slide out tray assemblies for ease of

maintenance with no extenders

■ BTSC Stereo Ready

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VHF Solid State Transmitter / Translator

Visual Performance

Power Output (Peak) 10 / 20 / 50 watts Output Impedance 50 ohms Output Connector Type “N” Frequency Range (low band) 54 to 88 MHz Frequency Range (high band) 174 to 216 MHz Carrier Stability (Transmitters

or Translators with FCR) ±250 Hz

Frequency Translation Stability

(Translators) ±250 Hz Regulation of RF Output Power 3% Output Variation (over 1 frame) 2% Sideband Response

-1.25 MHz and below -20 dB

-0.75 to -0.5 MHz +0.5, -2.0 dB

-0.5 to +3.58 MHz ±0.5 dB

3.58 MHz to 4.18 MHz +0.5, -1.0 dB Freq Response vs. Brightness ±0.5 dB Visual Modulation Capability 1%

(Transmitters) Differential Gain 5% Incidental Phase Modulation ±3° Linearity (Low Frequency) 5% Differential Phase ±3° Signal-to-Noise Ratio 55 dB 2t K-Factor 2% Envelope Delay

Transmitters Per FCC Standard

Translators ±40 ns Video Input (Transmitters) 75 ohms Harmonic Radiation -60 dB Intermodulation Products -52 dB (red field) Spurious -50 dB

(>3 MHz from channel edge) Noise Figure w/input Preamp 6 dB (max.)

(Translators) Input Dynamic Range -76 to -25 dBm

(Translators)

Aural Performance

Power Output (Average) 1 / 2 / 5 watts Distortion 0.5% FM Noise -60 dB AM Noise -53 dB Aural to Visual Separation 4.5 MHz, ±100 Hz

(Transmitters)

Composite Audio Input (Transmitters)

Input Level 1V peak, nominal Input Impedance 75 ohms, unbalanced Freq (±0.5 dB response) 30 Hz to 120 kHz

Monaural Audio Input (Transmitters)

Input Level 0 to +10 dBm Input Impedence 600 ohms, balanced Freq Range (±0.5 dB resp) 30 Hz to 15 kHz Pre-emphasis 75µs

Subcarrier Input (Transmitters)

Input Level 1V peak, nominal Input Impedance 75 ohms, unbalanced Freq Range (±0.5 dB resp) 20 kHz to 120 kHz

General

Operational Temperature Range -30°C to +50°C Operational Humidity Range 0% to 95% Altitude up to 8,500 feet Size (H x W x D)

110A / 115A 7” x 19” x 21” Transmitters 8.75” x 19” x 21” (exc 110A / 115A)

Translators 10.5” x 19” x 21” Weight 30 lbs. Line Voltage 115/230VAC, ±10%,

1 phase, 50/60 Hz

Power Consumption 250 / 350 / 350 watts

B0001 1101R1-E

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117B 20 Watt VHF High Band Translator Installation Procedure

UNPACKING Please inspect all material thoroughly upon arrival. Axcera certifies that upon leaving our facility

the equipment was undamaged and in proper working order. The shipping container should be inspected for obvious damage that is indicative of rough handling.

Remove the Cabinet Assembly or if shipped separately, the Receiver Tray, the VHF Upconverter/Amplifier Tray, the Wire Harness and the Installation Material Kit from the shipping containers and inspect for damage. Check for dents, scratches or a broken switch, meter or connector. Remove the top covers from the Trays and again inspect for shipping damage. Extract all packing material from inside and around the Trays. Check for loose hardware and connectors, retighten if needed. Any claims against in-transit damage should be directed to the Carrier.

SITE CONSIDERATIONS There are special considerations which must be made before installing the 117B and this section

will help you plan ahead. The AC line requirements is an important consideration in Site planning. Each Translator requires a

10 Amp feed. Another important Site consideration is temperature control. The 117B is rated for operation in an

ambient temperature range of 0° to 45° C. Over temperature problems are far more likely than under temperature. Over temperature can cause heat related problems such as thermal runaway or component failure. The Tray contains a Thermal Interlock Circuit that will shut down the Translator until the temperature drops to an acceptable range.

The Translator requires a cooling system that is adequate for the heat created by the power dissipation of the Translator. This problem may not surface for many months if the installation is completed during cool weather, but may suddenly appear during the heat of summer days.

In many cases, a simple heat exhaust system is adequate. A thermostatically controlled fan to exhaust the heat to the outside works very well if a few guidelines are followed:

1. Check that the fan is large enough. At least 200 CFM per Translator.

2. Place the fan high enough on the wall or in the ceiling where the heat is located.

3. Provide an air intake for cool air. This intake should be on the other side of the room and low on the wall to allow air to flow over the Translator Cabinet. The intake should also be large enough to accommodate the capacity of the exhaust fan.

In very hot climates, air conditioning may be required, and cooling capacity must be considered. The size of the Transmitter Room and the number of Transmitters and/or Translators and other equipment will determine what size system is required. An HVAC Technician should be consulted. With both exhaust and air conditioning systems it is better to over estimate the operating capacity than to under estimate. This provides for a safe operating margin.

Though it is less likely to cause problems, extreme cold should also be anticipated. Extremely low temperatures may cause condensation inside the Tray due to a large differential between ambient and internal temperatures. The equipment itself may provide enough heat for normal operation, if the room is small enough and properly weatherproofed. However, it is better to install a small heater than to take a chance. The heater will also provide warmth for Technical Personnel if maintenance or repairs are necessary during the winter months.

INSTALLATION PROCEDURE - CONTINUED INSTALLATION OF THE TRANSLATOR

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117B 20 Watt VHF High Band Translator Installation Procedure

For units that are supplied with a cabinet, remove the Cabinet from the shipping container. Remove the plastic covering. If the Trays are shipped separately, the shipping material must be removed from the inside of the Cabinet before the Trays are inserted into the Cabinet. Cut the cable ties or cord which hold the Tray Harness breakouts to the Tray Slides. Carefully remove the foam packing material from around the cables, connectors and slides. Do not use a Knife or other sharp object as these may cut the wires. Slide the Trays into the cabinet, if they are not already mounted. Check that the cable breakouts for the Trays are not caught in the Trays as they are slid into place.

If the Trays are shipped mounted in the Cabinet , remove the two metal brackets which hold the Trays in place during shipment. These are held in place by two screws and must be removed to allow the Trays to be pulled out for Test.

If the Trays do not slide in and out of the cabinet smoothly, loosen the hardware holding the slides onto the front of the cabinet and move the Tray up or down to stop it from rubbing. Retighten after the necessary adjustments have been made.

Secure the small cable retractors, tied to the main harness, to the rear of each Tray by sliding them into the clip located there. Refer to the rear view of the Trays for more details. Connect the plugs of the main harness to the corresponding Jack numbers on each Tray, starting with (A2) the Upconverter/Amplifier Tray. (A1) is the Receiver Tray. (An Example of the numbering is : 1 2 on the cable from the main harness stands for the Receiver Tray A1, AC Input Jack J2).

After the Trays have been installed and all harness connections have been made, connect the Main AC to the AC Input Box located at the upper, right rear of the Cabinet. 240 VAC, 30 Amp, #10 AWG, 4 wire is recommended. A Qualified Electrician should do the Main AC Installation. The AC Input Plug for each Tray should be connected to the AC Outlet Box.

INSTALLATION OF A TRANSLATOR NOT SUPPLIED WITH A CABINET

Two Tray slides are provided for the 1 3/4" Receiver Tray and the 7" VHF Upconverter/Amplifier Tray. The Receiver Tray should be mounted under the Upconverter/Amplifier Tray. Locate the Tray slides and install the left slide into the cabinet first. The left side slide is plain with no cable retractor attached. Mount this slide onto the left side of the cabinet, looking from the rear using the bolts and nuts provided. Refer to the "Cabinet Mounting Instructions For Tray Slides" drawing for more details. Check that the slide is level from front to back. NOTE: Allow a spacing of approximately 5 inches between the end of the stationary section of the slide and the rear mounting bar of the cabinet to permit normal operation of the cable retractors.

Install the slides onto the right side of the cabinet, looking from the rear. These slides connect the end bracket, attached to the main harness, to the stationary section of the slide with two #10 hex nuts provided. Now secure the slide by connecting it to the front and rear mounting bars using #10 bolts and the bar nuts provided.

Connect the plugs from the main harness to the corresponding Jack numbers on each Tray. (Example: 2 1 means the VHF Upconverter/Amplifier Tray A2, Jack J1). Check that the AC Input Plugs to the Trays are connected to the AC Outlet Box.

After Installation of the Trays, refer to the Check Out and Operation Procedure for the initial operation of the Translator.

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117B 20 Watt VHF High Band Translator System Check Out and

Operation Procedure

SYSTEM CHECK OUT AND OPERATION PROCEDURE Connect the output at the "N" Type connector J4 of the 20 Watt VHF Upconverter/Amplifier Tray

to a suitable load or the Antenna for your System. Connect the Low Band VHF Channel RF Input Signal to Jack J1 located on the rear panel of the Receiver Tray.

Switch the AC Main Circuit Breaker on. Switch On the On/Off Power Switches located on the Receiver Tray and the VHF Upconverter/Amplifier Tray and observe that the switches light, indicating AC is present to that Tray. Flip the Operate/Standby Mode Switch located on the VHF Upconverter/Amplifier Tray and confirm that the LED indicators will also switch. Switch the Translator to Standby.

The Translator Control (Automatic/Manual) Switch S3, located on the front panel of the VHF Upconverter/Amplifier Tray, switches the Translator between the Automatic and Manual mode of operation. In Automatic, the Translator will revert to Standby if the input RF signal is lost. During Testing of the Translator, Switch S3 to Manual, this will keep the Translator from going to Standby if the Input RF is removed. Normal Operation is with the switch in the Manual Mode.

Slide the Upconverter/Amplifier Tray out and remove the top cover. Check that switches S1 (ALC) and S2 (AGC), located on (A10) the ALC/AGC Board (1067-1116) are both in the Automatic position. Confirm that S1 on (A11) the Linearity Corrector Board (1161-1116) is Enabled. Switch the Translator to Operate. The Amplifier Status LED (DS4) will light indicating normal current draw by (A17-A2) the High Band VHF Amplifier Board (1174-1101). The Green Thermal Interlock LED (DS3) will light indicating that the temperature within the Tray is Normal. Switch the Front Panel Meter Selector Switch to the Power Supply Voltage position and confirm a reading of +24 VDC, the voltage produced by (A3) the Switching Power Supply Assembly.

Turn the Front Panel Meter Selector Switch to the % Visual Power Position and verify a reading, normally 100%, which is the same value as written on the Test Data Sheet for the Translator. Turn the Meter Selector Switch to the % Aural Power Position and verify a reading which is the same value as written on the Test Data Sheet for the Translator. The Aural/Visual Ratio is typically set to 10 dB at the factory. Turn the switch to the % Reflected Power Position and verify the Test Data Sheet Reflected Power value, <10%. The ALC Reference Voltage Position should read 2 Volts. The AGC Detector Voltage Position should read .3 Volts.

If the Translator has completed the above System Check Out Procedure, replace the lids of the Trays and slide them back into place. If a problem occurred in a Tray, refer to the Detailed Alignment Procedure in that Tray Section of the Manual for more information.

Check that the RF Input Signal is connected to the Receiver Tray. Check that the RF output of the 20 Watt VHF High Band Upconverter/Amplifier Tray is connected to the antenna for your System. Check that the Automatic/Manual Switch located on the front panel of the Upconverter/Amplifier Tray is switched to the Manual position.

You are now ready for the normal operation of the Translator. Set-up of the linearity correctors are described in the System Alignment Procedure which follows.

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117B 20 Watt VHF High Band Translator Switch Position and Status

for Normal Operation

Switch Position and Status for Normal Operation

VHF Low Band Receiver Tray

(A12) IF ALC Board (1109-1402) S1 switched to ALC position.

20 WATT VHF High Band Upconverter/Amplifier Tray

(A10) ALC/AGC Board (1067-1116) S1 switched to ALC position

S2 switched to AGC position DS2 not lit (Video is Present) DS3 not lit (No ALC Fault) DS4 not lit (No AGC Fault)

DS5 not lit (No RF Mute) (A11) Linearity Corrector Board (1161-1116) S1 switched to Correction in, Enable (A7) Transmitter Control Board (1161-1109) S1 switched to Modulator, DS5 lit.

DS1 not lit (RF Input is present to the

Receiver Tray). May be lit all the time if

Receiver Tray not used.

DS2 not lit (Video Input to

Upconverter/Amplifier Tray is present).

DS3 not lit (Video Input is present to the

Modulator Tray. May be lit constantly if

Optional Modulator Tray not present. Front Panel Auto/Manual Switch (S3) Manual position Front Panel Meter Selector Switch (S1) Selects metering: % Visual Output Power, %

Aural Output Power, % Reflected Power,

Power Supply Voltage, ALC Reference Voltage

and AGC Detector Voltage.

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117B 20 Watt VHF High Band Translator System Alignment Procedure

The Translator has been factory aligned and should not require adjustment to obtain normal operation. For a Detailed Alignment Procedure of each Tray, refer to the Receiver Tray or the 20 Watt Upconverter/Amplifier Tray section of this Manual.

SYSTEM SET UP The system set-up includes adjustment of linearity to compensate for any amplifiers nonlinear

responses. The Translator should be switched On initially into a 20 Watt dummy load to verify that the system is functioning properly.

In the VHF Upconverter/Amplifier Tray, check that the ALC Auto/Manual Switch (S1), located on (A10) the ALC/AGC Board (1067-1116), is in Auto. Switch the On/Off Circuit Breakers located on the front panels of the Receiver and the 20 Watt Upconverter/Amplifier to the On position. Switch the Translator to Operate and adjust the ALC Reference Pot (R47), or (R2) the Front Panel Power Adjust, to obtain a Detected IF Output Voltage Level of +2.0 VDC at TP3 of the ALC/AGC Board. The Front Panel Meter in the ALC Reference Voltage position should also read +2.0 VDC. Switch the ALC Auto/Manual Switch (S1) to Manual ALC and adjust the Manual ALC Pot (R17) to obtain a Detected IF Output Voltage Level of +2.0 VDC at TP3 of the ALC/AGC Board. Switch the ALC Auto/Manual Switch (S1) to Auto ALC.

In the VHF Upconverter/Amplifier Tray, check that the AGC Switch (S2), located on (A10) the ALC/AGC Board (1067-1116) is in Auto. Preset the AGC Auto Gain Pot (R96) and the AGC Manual Gain Pot (R101) to minimum (CCW). Switch the Front Panel Automatic/Manual Switch to Manual. Switch the front panel Metering Switch, located on the 20 Watt Upconverter/Amplifier Tray, to the % Visual Output Power position and adjust the AGC Auto Gain pot (R96) located on (A10) the ALC/AGC Board (1067-1116) to 100% on the meter. Switch the AGC Switch (S2) to the Manual Position and adjust the AGC Manual Gain pot (R101), located on the ALC/AGC Board, also for 100% on the meter. Switch S2 back to Automatic. The Front Panel Meter of the Upconverter/Amplifier Tray in the AGC Detector Voltage position should read +.3 VDC, but the exact values are written on the Final Test Data Sheet for your System.

Connect a Demodulator and Oscilloscope or other monitoring equipment to monitor the differential gain and differential phase of the output signal. If a synchronous demodulator having a quadrature video output is available, it may be employed with an X-Y Oscilloscope to display incidental carrier phase modulation (ICPM). As shipped, the Translator was preset to include linearity (gain vs. level) predistortion which was adjusted to compensate for the corresponding non-linear distortions of the solid state amplifier devices in the Translator. Switch S1 located on (A11) the Linearity Corrector Board (1161-1116), to the On position.

SYSTEM SET UP OF LINEARITY The IF linearity correction function consists of three non-linear cascaded stages, each having an

adjustable magnitude and a threshold, cut -in point. The threshold adjustment determines at what IF signal level the corresponding corrector stage begins to increase gain. The magnitude adjustment determines the amount of gain change for the part of the signal which exceeds the corresponding threshold point. Because the stages are cascaded, the order of correction is important.

The first stage should cut -in nearest the white level, with the cut-in point of the second stage moving toward black, with the last stage primarily stretching sync. Linearity Corrector Board pots R3, R13 and R23 control the overall gain of each stage. They were preset during Final Test at the Factory and should not require adjustment. If moved accidentally, typical settings are R3, R13 and R23 mid-range.

SYSTEM SET UP OF LINEARITY - CONTINUED

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117B 20 Watt VHF High Band Translator System Alignment Procedure

To adjust the linearity correction from scratch, preset the Linearity Corrector pots R5, R16 and R26 (threshold) to CCW and Linearity Corrector pots R2, R11 and R22 (magnitudes) CW. Insert a 3.58 MHz modulated staircase or ramp video test signal into the Tray and monitor the differential gain of the output. Switch the ALC Auto/Manual Switch (S1) located on (A10) the ALC/AGC Board to Auto ALC. This completes the ALC loop.

Adjust the ALC Reference Pot (R47), or the Front Panel Power Adjust, to obtain a Detected IF Output Voltage Level of +2.0 VDC at TP3 of the ALC/AGC Board. The Front Panel Meter in the ALC Reference Voltage position should also read +2.0 VDC. Switch the ALC Auto/Manual Switch (S1) located on (A10) the ALC/AGC Board to Manual ALC and adjust the Manual ALC Pot (R17) to obtain a Detected IF Output Voltage Level of +2.0 VDC at TP3 of the ALC/AGC Board. Switch the ALC Auto/Manual Switch (S1) located on (A10) the ALC/AGC Board to Auto ALC. The ALC will now operate to maintain the corresponding peak power level following the correctors. Therefore, the linearity adjustment procedure should be repeated to achieve the correct differential gain predistortion. A positive aspect of linearity adjustment with ALC and AGC enabled is that the control movements will not affect peak power. This completes the preset steps.

While observing Differential Gain, adjust the first linearity stage and advance the Threshold #1 Control (R5) CW to stretch the signal above the White and Mid-Luminance region. Back off on the corresponding Magnitude #1 Control (R2) as required. Next, advance the Threshold #2 Control (R16) to stretch the Black and Sync levels, then back off on the Magnitude #2 Control (R11) as required. Adjust the Threshold #3 Control (R26) to further stretch the Black and Sync levels. Back off on the corresponding Magnitude #3 Control (R22) as required. Go back through the White through Black and Sync correctors to touch up the effects of ALC Level changes during the adjustment. If the amplifier is being driven very close to saturation, it may not be possible to get enough Sync Stretch while maintaining a flat differential gain. The IF linearity correctors, when properly adjusted, will provide excellent lower sideband suppression and minimum frequency response change vs. level. These results are achieved by generating intermod products which cancel with those produced by the amplifier, an effect which is not possible with video correction.

FINAL AGC ADJUSTMENT Check that the ALC Voltage is set to +2.0 VDC at TP3. Switch the front panel Metering Switch,

located on the Front Panel of the VHF Upconverter/Amplifier Tray, to the % Visual Output Power position and adjust the AGC Auto Gain pot (R96) located on the ALC/AGC Board to 100% on the meter. Switch the AGC Switch (S2) the Manual Position and adjust the AGC Manual Gain pot (R101), located on the ALC/AGC Board, also for 100% on the meter. Switch S2 back to Automatic. The Front Panel Meter of the Upconverter/Amplifier Tray in the AGC Detector Voltage position should read (.3 VDC) and in the ALC Reference Voltage Position (2 VDC), but the exact values are written on the Final Test Data Sheet for your System.

This completes the System Alignment Procedure for the 117B.

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117B 20 Watt VHF High Band Translator Remote Control Connections Remote Control Interface Jack (J7) 37 Position "D" Connector Function Connector Interface Type

Rmt Operate Command J7 Pin 1 Contact Closure Rmt Operate/Standby Rtn J7 Pin 2 Rmt Standby Command J7 Pin 3 Contact Closure

Rmt Operate Indicator J7 Pin 4 50mA Max. Current Sink Rmt Operate Indicator Rtn J7 Pin 5

Rmt Standby Indicator J7 Pin 6 50mA Max. Current Sink Rmt Standby Indicator Rtn J7 Pin 7

Rmt Aural Power Metering J7 Pin 8 1v Full Scale At 1k Rmt Aural Pwr Metering Rtn J7 Pin 9 Source Resistance

Rmt Reflected Power Mtring J7 Pin 10 1v Full Scale At 1k Rmt Reflected Pwr Mtr Rtn J7 Pin 11 Source Resistance

Rmt Visual Power Mtring J7 Pin 12 1v Full Scale At 1k Rmt Visual Power Mtring Rtn J7 Pin 13 Source Resistance

Rmt Visual + Aural Pwr Mtr J7 Pin 14 1v Full Scale At 1k Rmt Vis + Aural Pwr Mtr Rtn J7 Pin 15 Source Resistance

Rmt Am I.D. Indicator J7 Pin 20 50ma Max. Current Sink Rmt Am I.D. Indicator Rtn J7 Pin 21

Notes: These functions are accessed through the 37 position "D" connector (J7) located on the

rear panel of the VHF High Band Upconverter/Amplifier Tray. J7 Pins 16 - 19 are not used in this Translator.



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117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Opt) Frequency Correction

Circuit Description

The UHF/VHF Receiver Tray w/(Optional) Frequency Correction selects the desired UHF or VHF On Channel Input Signal and converts it to a Combined IF Signal of 45.75 MHz Visual + 41.25 MHz Aural. The Tray also has provisions for a Frequency Correction Option that consists of a VCXO Channel Oscillator Assembly with a PLL Circuit which maintains an exact IF Output Frequency, over the capture range of the PLL circuit, even if the Input UHF or VHF Frequency may vary.

RF Input Signal Path The RF Input to the Tray, (-61 dBm to -16 dBm in Level), is fed through J1 for 50Ω to (A7) the

input 50Ω Filter, DC Multiplexed (1035-1204 UHF, 1035-1902 VHF LB or 2065-1024 VHF HB) or through J5 for 75Ω to (A7) the 75Ω input Filter, DC Multiplexed (1035-1207 UHF, 1035-1903 VHF LB or 2065-1023 VHF HB), which is of a double tuned design that is adjusted to the desired Input UHF or VHF Channel Frequency. Note: If the input signal is greater then -25dBm, an attenuator should be used to limit the level to -25dBm. +12 VDC, for use by an (Optional) external Preamplifier Assembly, connects to the filter through F1 a 1 Amp Fuse. This +12 VDC is DC Multiplexed onto the input signal cable from the Preamplifier. DS1 a Red LED located on TB1 in the Tray will be lit if the +12 VDC is present on the input cable. If a Preamplifier is not used, F1 should be removed and DS1 should not be lit.

The signal is next amplified +12 dB to approximately the -49 to -4 dBm level by a low noise amplifier located on (A8-A1) the Dual Stage Amplifier Board (1227-1501) that is contained in (A8) the Dual Stage Amplifier Assembly (1227-1503). The board has approximately +13 dB or +26 dB of gain, depending on whether Jumper W1 on J5 is in place. The signal is then filtered in (A9) a Channel Filter (1007-1101 UHF, 1034-1202 VHF LB or 2065-1000 VHF HB) and then applied back to (A8-A1) the Dual Stage Board where the same amplification takes place. Jumper W1 on J7, located on the Dual Stage Board, should be removed if the Receiver Input level is greater than 40dBm. The output is connected to (A10) the Downconverter Amplifier Assembly (1227-1505) that contains (A10-A1) the Downconverter Amplifier Board (1227-1502). The RF, at the -47 dBm to -2 dBm Level, connects to the "R" Input Jack of the Mixer Z1 located on the Downconverter Amplifier Board.

Local Oscillator Signal Path The Local Oscillator Signal is derived from a cut to channel crystal mounted in an oven that is

factory set at 45° C. The Oscillator operates at 1/8 for UHF, 1/4 for VHF High Band or 1/2 for VHF Low Band of the desired local oscillator frequency. The crystal is mounted on (A4-A1) the Channel Oscillator Board, Dual Oven (1145-1201), that is part of the Channel Oscillator Assembly (1145-

1202). The oscillator circuitry is a modified Colpitts design operating in a separate oven set at 50° C. for improved stability. If the Frequency Correction Option is purchased, the VCXO Channel Oscillator Assembly (1145-1206), which contains the VCXO Channel Oscillator Board (1145-1204), is used in place of the standard Channel Oscillator Assembly, and an AFC voltage from the PLL circuit maintains the frequency of the VCXO.

The output of the Channel Oscillator is connected to the (A5-A1) the x8 Multiplier Board (1227-1002) for UHF, the x4 Multiplier Board (1227-1525) for VHF HB or the x2 Multiplier Board (1227-1524) for VHF LB, which is located in (A5) the Multiplier Enclosure (1265-1125). The proper multiplier board takes the output of the Channel Oscillator (+3 dBm) and multiplies it eight, four or two times by a series of three, two or one x2 Broadband Doublers (2x2x2 = x8), which produces the L.O. signal on the desired frequency needed for the upconversion process. The signal is then amplified to the +16 dBm level. A sample of the multiplied L.O. Signal is fed to a detector circuit which lights the Green LED DS1 that indicates that the L.O. is present at the Output Jack J2 of the Multiplier Board. This Green LED is seen through a hole the lid of the Multiplier Assembly and is an indication, when lit, that there is a signal present at the output of the Multiplier Board. The L.O. signal is filtered in (A6) a L.O. Filter 1007-1101 UHF, 2065-1000 VHF HB or 1034-1211 VHF LB) and then sent (+15 dBm) to J2 on (A10-A1) the Downconverter Amplifier Board. The L.O. Input to the Downconverter Amplifier Board is connected thru a 3 dB matching pad to the "L" Input of the Mixer (Z1) at a +12 dBm level.

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117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Opt) Frequency Correction

Circuit Description

Combined IF Signal Path The L.O. and the RF signals are mixed in the Mixer Stage of the Downconverter Amplifier Board to

produce the desired IF difference frequency at -55 dBm to -10 dBm in level, depending on the RF Input Level. The Combined IF Signal is routed to (A11-A1) the IF Filter/ALC Board (1227-1504), which is mounted in (A11) the IF Filter/ALC Enclosure (1265-1105). The IF Filter/ALC Board contains a Pin Diode Attenuator circuit which is part of the Automatic Level Control (ALC) that controls the level of the IF Signal to the two stage amplifier ICs U1 and U2.

The (Optional) (A11-A2) SAW Filter/Amplifier Board (1035-1211) is also contained in the IF Filter/ALC Enclosure. The SAW Filter/Amplifier Board connects to J5 and J6 of the IF Filter/ALC Board if more attenuation of the Out Of Band products is needed. If the SAW Filter/Amplifier Board is not needed, a jumper connects the Combined IF from J5 to J6 on the IF Filter/ALC Board.

The Combined IF is then bandpass filtered to the needed 6 MHz IF bandwidth around the 41.25 MHz + 45.75 MHz Combined IF signal and amplified by U3 to the -41 dBm to +4 dBm Level before it is split. One output is detected by U4 for use as the ALC reference level to the Pin Diode Attenuator Circuit. The ALC comparator drives the Pin Diode Attenuator Circuit to maintain the desired output level, typically +2 dBm. The other split output connects to J2 the Combined IF Output of the board that is cabled to the IF Output Jack of the Tray at J4 (+2 dBm).

Frequency Correction Option If the Frequency Correction Option (1227-1528) is purchased, (A13) the IF Filter/Limiter Board

(1109-1001), (A14) the IF PLL Board (1109-1002), the (A15) IF Carrier Oven Oscillator Board (1100-1206), (A4) the VCXO Channel Oscillator Assembly (1145-1206) and (A16) an IF Amplifier Board, High Gain (1197-1126) are part of the System.

A Sample of the amplified and ALC controlled signal from the IF Filter/ALC Board is directed to the IF Amplifier Board, High Gain (1197-1126) where it is amplified and connected to J2 on (A13) the IF Filter/Limiter Board (1109-1001). The IF is filtered by a SAW Filter, which passes Visual Carrier and Aural Carrier only, and amplified before it is split. The Aural IF Output is not used in this Tray. The other output of the splitter is amplified and applied to a Notch Filter. The Notch Filter is tuned to the Aural Frequency by C17 and R10 which reduces or eliminates the Aural IF from the Visual IF signal. The Visual IF Only signal then connects to a video detector circuit which in conjunction with U5 strips the video from the Visual IF signal. The IF CW Signal is amplified and buffered before it is connected to the output of the board at J6. The IF CW connects to J2 of (A14) the IF PLL Board (1109-1002).

The IF CW Signal (+3 dBm) on the IF PLL Board is wired to U1 a Divider IC which, in conjunction with U2, sets up one of the reference signals to the comparator circuit. The other reference signal is derived from the 50 kHz reference Input at J4 which is a divided down 50 kHz sample of the 38.9 MHz signal generated on (A15) the IF Carrier Oven Oscillator Board (1100-1206). The 38.9 MHz IF Carrier Oven Oscillator Board is used instead of the 45.75 MHz IF Carrier Oven Oscillator Board to minimize the interference between the generated 45.75 MHz IF and the signal generated on the (A15) IF Carrier Oscillator Board. The 38.9 MHz signal itself is not used, just the divided down 50 kHz reference of the 38.9 MHz Signal is used. The two reference signals applied to the IF PLL Board are compared by U2 and a difference voltage (AFC) is produced. The difference voltage (AFC), approximately -3 VDC, is fed from J3 of the board to FL2 of (A4) the VCXO Assembly. If the frequency of the VHF or UHF Input to the Tray should drift, the ALC voltage will change to increase or decrease the output frequency of the VCXO Assembly which increases or decreases the L.O. Frequency that maintains the IF Frequency at the standard 45.75 + 41.25 MHz Frequency. If the frequency of the Input Signal should drift out of the capture range of the PLL Circuit, DS1 the Red LED Unlock Indicator, located on the IF PLL Board, lights.

Voltages for Operation of the Tray

- Page 2 of 3 -

Page 15

117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Opt) Frequency Correction

Circuit Description

The AC input to the Tray is 117 VAC or 230 VAC and is directed thru Jack J2, of the (A1) Power Entry Module (1265-1104), to the step down Toroid (A2). The Power Entry Module contains an On/Off Switch, a 4 Amp Slo-Blo Fuse and three MOVs which protect the Tray from transients or surges which may occur on the AC Input Lines. When the On/Off Switch is switched On, AC is applied to the (A2) Toroid. The Toroid steps down the voltage into two 16 VAC outputs which are fed to (A3) the +12V(3A)/-12V Power Supply Board (1092-1206). The 16 VAC Inputs are connected to the two full wave bridge networks one for +12 VDC and one for -12 VDC. The output of the +12 VDC rectifier is fed to three 7812 IC regulators (U1, U2 and U3) and the output of the -12 VDC rectifier is fed to one 7912 IC regulator (U4). The ±12V Power Supply Board provides the voltage regulated and current limited +12 VDC and -12 VDC to the rest of the boards in the Tray.

+12VDC for External Preamplifier +12 VDC is also applied through a 1 Amp Fuse F1 to (A7) the input DC Multiplexed UHF or VHF

Filter. The +12 VDC is multiplexed in the Filter onto the input coaxial cable that connects from the (Optional) Remote Preamplifier Unit to the Receiver Tray. This supplies the Preamplifier with the +12 VDC needed for operation. The Red LED DS1 mounted on the Terminal Block TB1 will be lit if the +12 VDC is applied to the coaxial cable. Note: If the Red LED, DS1, is lit, the +12 VDC may damage Test Equipment that is connected to the input of the Receiver Tray. If a Preamplifier Assembly is not part of your System, F1 should be removed, therefore DS1 should not be lit and the +12 VDC is not multiplexed onto the input coaxial cable. A spare Fuse for F1 is supplied and stored near the fuse holder for F1.

- Page 3 of 3 - January 7, 2002

Page 16

117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Optional) Frequency Correction

Detailed Alignment Procedure

Connect a UHF or VHF Input with a Multiburst Test signal applied, that is at the desired Channel Frequency, to J1 50Ω or J5 75Ω located on the rear of the (A3) VHF/UHF Receiver Tray. Check that the On/Off Switch located on the rear of the Tray is On.

Note: If the Red LED, DS1 is lit, +12 VDC is present at the input of the Receiver Tray and may damage any test equipment connected to it. Remove the fuse F1, DS1 will not be lit, before connecting test equipment to the input jack of the Receiver Tray.

(A7) UHF Filter, DC Multiplexed (1035-1204, 50Ω or 1035-1207, 75Ω), VHF Filter, LB, DC Multiplexed (1035-1902, 50Ω or 1035-1903, 75Ω) or VHF Filter, HB, DC Multiplexed (2065-1024, 50Ω or 2065-1023, 75Ω)

The input UHF or VHF signal (-61 dBm to -16 dBm) is fed to the filter which has been factory swept for 6 MHz Bandwidth at the Channel frequency and should not be tuned in the field. The output of the filter is directed to the J1 input of (A8) the Dual Stage Amplifier Assembly.

(A8-A1) Dual Stage Amplifier Board (1227-1501) Mounted in: (A8) a Dual Stage Amplifier Assembly (1227-1503).

The Dual Stage Amplifier Board has been factory set to the channel frequency and contains no customer tuning adjustments. The board has approximately +13 dB or +26 dB of gain, depending on whether Jumper W1 on J5 is in place.

(A9) UHF Filter (1007-1101), VHF LB Filter (1034-1202) or VHF HB Filter (2065-1000) The UHF or VHF Filter has been factory swept for 6 MHz Bandwidth at the Channel Frequency and

should not be tuned in the field. The output of the filter (-50 dBm to -5 dBm) is fed either through the additional amplifier stage on the Variable Gain Amplifier Board or to (A10-A1) the Downconverter/Filter Board.

(A4) Channel Oscillator Assembly, Dual Oven (1145-1202) Contains: The Channel Oscillator Board, Dual Oven (1145-1201).

1. Connect the main output of the Channel Oscillator (J1) to a spectrum analyzer, adjusted to view the crystal frequency, and peak the tuning capacitors C6 and C18 for maximum output. Then tune L2 and L4 for maximum output. The output level should be approximately +5 dBm and the Oven Temperature should be maintained at 50°C.

If a spectrum analyzer is not available, connect a DVM to TP1 on the x8, x4 or x2 Multiplier Board. Tune capacitors C6 and C18 for maximum voltage at TP1. Then tune L2 and L4 for maximum voltage at TP1.

2. Connect the sample output of the Channel Oscillator at J2 to a suitable counter and tune C11, Coarse Adjust, and C9, Fine Adjust, to the crystal frequency. Do not re-peak C6, C18, L2 or L4 because this may change the output frequency.

Note: While adjusting C9 and C11 to the crystal frequency the peak voltage monitored at TP1 of

the Multiplier Board should not decrease. If a decrease does occur a problem with the crystal is likely.

3. Reconnect the main output at J1 of the Channel Oscillator to the Input Jack J1 of the Multiplier Board.

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Page 17

117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Optional) Frequency Correction

Detailed Alignment Procedure

(A4) Channel Oscillator Assembly, Dual Oven (1145-1202) - Continued Contains: The (A4-A1) Channel Oscillator Board, Dual Oven (1145-1201).

Note: If the Optional Frequency Correction Kit is purchased a VCXO Assembly (1145-1206),

containing a VCXO Board (1145-1204), will be used instead of the standard Channel Oscillator Board. The adjustment will be the same as above except that the frequency is adjusted by moving the Jumper W1 on Jack J6, located on the IF PLL Board (1109-1002), to Pins 2 & 3, Fixed Bias, and adjusting R15 on the IF PLL Board for -3 VDC at FL2 of the VCXO Assembly. Move the Jumper W1 on Jack J6 to between Pins 1 & 2, AFC. Connect the Oscillator Sample output, at (J2) of the Channel Oscillator or the Front Panel Sample Jack (J9), to a suitable Frequency Counter and tune C11, Coarse Adjust, to the desired frequency. Do not re -peak C6, C18, L2 or L4 because it may change the output frequency.

Reconnect the main output (J1) of the Channel Oscillator (+5 dBm) to the input (J1) of the

Multiplier Board. DS1 the Red Unlock Indicator, located on the IF PLL Board, should not be lit.

(A5-A1) x8 Multiplier Board (1227-1002), x4 Multiplier Board (1227-1525) or x2 Multiplier Board (1227-1524) Mounted in (A5) a Multiplier Enclosure (1265-1125).

During Normal operation, the Green LED DS1, which can be seen through the access hole in the Enclosure Assembly, will be lit to indicate that the L.O. is present at the output of the x8 Multiplier Board.

1. Connect a Spectrum Analyzer to the Output Jack (J2) of the board.

2. Tune C4, C6, C10, C12, C18 and C20 on the x8 and the appropriate caps on the other boards for maximum output. Readjust all the Capacitors to minimize the seventh and the ninth harmonics, they should be at least -30 dB down, without affecting the x8 Multiplier Output.

If a Spectrum Analyzer is not available a DC voltmeter can be used as follows but the harmonic frequencies must be minimized to prevent interference with other Channels.

1. While Monitoring each Test Point with a DC voltmeter, maximize the voltage by tuning the Broadband Multipliers in the following sequence.

2. For x8 Multiplier Board: Monitor TP1 with a DVM and tune C4 for maximum. (Typical .6 VDC) Monitor TP2 and tune C6 and C10 for maximum. (Typical 1.2 VDC) Monitor TP3 and tune C12 and C18 for maximum. (Typical 2 VDC) Monitor TP4 and tune C20 for maximum. Re-peak C12 and C10 while monitoring TP4. (Typical 3.5 VDC)

For x4 Multiplier: Monitor TP1 with a DVM and tune C4 for maximum. (Typical .6 VDC) Monitor TP2 and tune C6 and C10 for maximum. (Typical 1.2 VDC) Monitor TP3 and tune C12 for maximum. Re-peak C12 and C10 while monitoring TP3. (Typical 2 VDC)

For x2 Multiplier: Monitor TP1 with a DVM and tune C4 for maximum. (Typical .6 VDC) Monitor TP2 and tune C6 for maximum. Re-peak C4 and C6 while monitoring TP2. (Typical 1.2 VDC)

The Green LED DS1 should be lit which indicates that the L.O. is present at the Output Jack J2 of the Multiplier Board. The output of the Multiplier at J2 is connected to (A6) a UHF or VHF Filter.

- Page 2 of 4 -

Page 18

117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Optional) Frequency Correction

Detailed Alignment Procedure

(A6) UHF Filter (1007-1101), VHF LB Filter (1034-1211) or VHF HB Filter (2065-1000) This filter has been factory swept at the L.O. frequency and should not be tuned without proper

equipment. The output of the filter (+15 dBm) is connected to J2 on (A10) the Downconverter/Filter Assembly.

(A10-A1) Downconverter/Amplifier Board (1227-1502) Mounted in: The (A10) Downconverter/Amplifier Assembly (1227-1505).

The Mixer contains no adjustments and has a L.O. input of approximately +12 dBm in level applied to J2 and a -47 dBm to -2 dBm RF input applied to J1. The output IF level at J3 will be -55 dBm to

-10 dBm.

1. Connect a Spectrum Analyzer to the Output Jack J3 and adjust L1, C2 and L3 for best frequency response.

2. Adjust C8 and R3 to notch out the Aural IF Frequency.

The IF output at J3 (-55 dBm to -10 dBm) is fed to the IF Filter/ALC Board. If needed a 10 dB Pad can be added to the circuit by moving the jumpers on J4 and J5 to the In position.

(A11-A1) IF Filter/ALC Board (1227-1504) Mounted in: The (A11) IF Filter/ALC Enclosure (1265-1105).

1. Check that Switch S1, located on the IF Filter/ALC Board, is in the Auto ALC and that the output of the Board at J2 is approximately 0 dBm Output, adjust R23 if needed.

(Optional) (A11-A2) SAW Filter/Amplifier Board (1035-1211) Mounted in: The (A11) IF Filter/ALC Enclosure (1265-1105).

This board is used for additional adjacent Channel rejection only if needed and may not be part of the Tray.

The board contains no tuning adjustments. The Jumpers W1 and W2 on J4 and J5 are placed for Attenuator In or Attenuator Out as needed to give the same output level at J2 as was at J1.

(A2) ±12V Power Supply Board (1092-1206) This board contains no adjustments. Note: If the (Optional) Frequency Corrector Kit is part of the tray, perform the following

adjustments. If the Frequency Corrector Kit is not part of the tray, the tray is aligned and ready for normal operation.

(Optional) (A15) IF Carrier Oscillator Board (1100-1206)

1. Monitor J3 with a Spectrum Analyzer and observe the 38.9 MHz Visual IF signal at +5 dBm.

2. Connect a Frequency Counter to J2 on the board or to J9 on the Front Panel and adjust C17 for 38.9 MHz.

- Page 3 of 4 -

Page 19

117B 20 Watt VHF High Band Translator UHF/VHF Receiver Tray,

w/(Optional) Frequency Correction

Detailed Alignment Procedure

(Optional) (A15) IF Carrier Oscillator Board (1100-1206) - Continued

3. Connect a Frequency Counter to J1 and check for the 50 kHz signal. Adjust C17, if needed, to attain the 50 kHz frequency. Remove the Jack on J5. DS2 the Unlock Indicator should light. Replace the Jack onto J5.

(Optional) (A13) IF Filter/ Limiter Board (1109-1001)

1. Monitor the Aural Notch Test Output of the board at J5 and move the Jumper W1 on Jack J4 to between Pins 2 & 3, Test Position. Adjust C17 to the Aural IF Frequency, then adjust R10 to eliminate or minimize the Aural IF signal. Move the Jumper W1 on Jack J4 back to between Pins 1 & 2, Operate Position.

2. Monitor the IF CW Output of the board at J6 with an Oscilloscope and adjust R12 and C21 for maximum Video Signal or connect a Spectrum Analyzer, in Zero Span, to J6 and adjust R12 and C21 for Minimum Video Signal amplitude ripple on the displayed signal.

3. Adjust R15 for +3 dBm or Maximu m output level if +3 dBm cannot be attained.

(Optional) (A14) IF PLL Board (1109-1002) Check that the Red LED DS1, Unlock Indicator, located on the board is not lit. If DS1 is lit, follow the alignment procedure for setting up the VCXO Channel Oscillator using R9 on

the IF PLL Board to set up the AFC Voltage for the Frequency of the VCXO. If it is still lit, check the 50 kHz reference output of the (A15) IF Carrier Oven Oscillator. If needed, follow the alignment procedure for the IF Carrier Oven Oscillator Board.

(Optional) (A16) IF Amplifier Board, High Gain (1197-1126) This board contains no customer adjustments. The amplified IF output from the IF Filter/ALC Board

connects to the IF Filter Limiter Board.

The Receiver Tray is now set up and ready for normal operation.

- Page 4 of 4 -

Page 20

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Circuit Description

The VHF Upconverter/Amplifier Tray takes the modulated Visual + Aural IF input from the Modulator or Receiver Tray and mixes it with a generated L.O. to produce the desired VHF High Band Channel Frequency output. The Tray then amplifies the VHF signal to the 20 Watt peak of Sync Visual Output power level.

IF SIGNAL PATH The input of the Upconverter/Amplifier Tray is a modulated Internally Diplexed IF signal. The IF

input network for the Tray is a simple bandpass filter located on (A10) the ALC/AGC Board (1067-1116) which eliminates harmonics on the input signal. The signal is next adjusted in level by the pin attenuator/ALC circuitry and sent to (A11) the Linearity Corrector Board (1161-1116). The Linearity Correctors compensate for the amplitude non-linearities of the final amplifiers by providing an opposite amplitude transfer function. The shape of this transfer function is set by the potentiometers located on this board. The corrector circuits can also be bypassed by the switches located on the board.

The output of the Linearity Corrector Board is sent back to the ALC/AGC Board where an AGC circuit compares a detected sample of the IF with a detected sample of the RF Output and adjusts the IF output to maintain a constant gain after the first sample point. This corrects for any temperature drift that may occur in the amplifier devices. (A9) The AGC Control Board (1137-

1201) provides adjustments of the AGC feedback from the Transmitter Control Board to the VSWR

Cutback circuit located on the Transmitter Control Board. The ALC and AGC controlled IF signal from J4 on the board is fed to Jack (J2) located on (A16) the

Mixer/Amplifier Enclosure, which contains (A16-A1) a Filter/Mixer Board and (A16-A2) a Filter/Amplifier Board. The IF Signal (-3 dBm Visual -13 dBm Aural) connects to Jack J7 of (A16A1) the Filter/Mixer Board (1150-1102) and is wired to the Mixer stage Z1. The Mixer mixes the IF with the local oscillator signal, that connects to J3 on the board, to produce the desired VHF output signal.

L.O. SIGNAL PATH The local oscillator signal is derived from a cut to channel crystal, located in an oven set at 45° C.

This oscillator circuit, which is part of (A14-A1) the Channel Oscillator Board (1145-1201), is a modified Colpitts circuit. The Channel Oscillator Board is mounted in (A14) a Channel Oscillator Assembly (1145-1202) that has a separate oven set at 50° C for improved stability. The output of the Oscillator Assembly at J1 is fed to (A15) a x4 Multiplier Board (1174-1112). The x4 Multiplier contains two doubler circuits which multiply the L.O. signal to the required frequency needed for mixing with the IF to produce the VHF High Band Channel Frequency. The L.O. Signal (+5 dBm) from J2 on the board is connected Jack J1 of (A16) the Mixer/Amplifier Enclosure which is cabled to Jack (J3) of (A16-A1) the VHF Filter/Mixer Board (1150-1102). The L.O. Signal is amplified by U2 and connected to J4 of the Board. The amplified L.O. Signal at (+14 dBm) is jumpered to (J5) the L.O. Input Jack to the Mixer Z1.

RF SIGNAL PATH The L.O. input and the IF input are mixed to produce an output of the Mixer at Jack (J6) (-14 dBm)

which contains the unwanted Mixer products along with the desired VHF Channel signal. These signals are jumpered from J6 to J1 the RF Input Jack of the VHF Filter/Mixer Board.

RF SIGNAL PATH - CONTINUED

- Page 1 of 3 -

Page 21

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Circuit Description

The RF Signal is bandpass filtered for the desired VHF Channel frequency and then amplified by U1 (-2 dBm Visual -12 dBm Aural) before it is connected to the RF Output Jack (J2) of the Board. The VHF output is connected to J7 of (A16-A2) the VHF Filter/Amplifier Board (1150-1101) on which it is filtered again and jumpered from J6 to J1 on the board. The +12 VDC needed for operation of the Filter/Mixer Board and the Filter/Amplifier Board are provided by (A6) the +12V(3A)/-12V Power Supply Board (1092-1206). The filtered VHF is amplified to +8 dBm and -2 dBm, R9 sets the gain of the Filter/Amplifier Board using a Pin- Attenuator circuit, and connected to J2 the RF Output of the Board.

J2 is cabled to J3 on the Mixer/Amplifier Enclosure Assembly. The RF is connected to Jack (J1) on (A17-A1) the VHF High Band Driver Board (1174-1107). The Driver Board contains a dual transistor stage Q1 that produces an output of +26 dBm Visual +16 dBm Aural. (A17-A1) The VHF High Band Driver Board and (A17-A2) the VHF High Band Amplifier Board are mounted on (A17) the Amplifier Heatsink Assembly (1174-1111). The output of the Driver Board connects to J1 of (A17-A2) the VHF High Band Amplifier Board (1174-1101). The VHF High Band Amplifier Board contains a dual Transistor Stage that amplifies the VHF Signal to +44 dBm Visual and +34 dBm Aural. R5 and R9 on the board are Bias Adjustments which set the gain of the Board. The VHF High Band Driver Board and the High Band VHF Amplifier Board receive their +26 VDC Bias voltage from (A3) the +26 VDC Switching Power Supply. DS4 the front panel mounted Amplifier Status LED, that is mounted across J3-2 and J3-3 of the VHF High Band Amplifier Board, will light if the +26 VDC is present to the board. The +26 VDC is connected to the board through (F1) the 8 Amp Fuse. The output of the VHF High Band Amplifier Board at J2 (+44 dBm Visual and +34 dBm Aural) is connected to (A18A1) a Low Pass Filter Board (1174-1102, 1174-1103 or 1174-1104 depending on frequency) which contains a Low Pass Filter and a 2nd Harmonic Trap. The filtered output is cabled to (A18-A2 & A3) two Trap Filter Boards (1174-1105 or 1174-1106 depending on frequency) each Board contains two Trap Filter circuits. The first Trap Filter circuit, containing C6 and C8, is tuned to -4.5 MHz while the second Trap Filter, containing C2 and C4, is tuned to +9 MHz. The output of (A18-A3) Trap Filter Board connects to Jack (J1) of (A23) a High Band VHF Coupler Board (1141-1002). The VHF Channel Frequency Output of the Coupler at J2 is directed to the rear of the Tray, the RF Output Jack (J4), (+43 dBm Visual and +33 dBm Aural).

A Forward Output Power Sample at J3 and a Reflected Output Power Sample at J4 are provided by the VHF Coupler. The Forward Power Sample is sent to (A24) a Splitter Assembly which provides two Forward Power Sample outputs that are connected to J1 and J2 on (A26) the Visual/Aural Metering Board (1161-1103). The Vis ual + Aural Forward Sample at J1 enters the board which is tuned to provide an Aural Only Output Sample at Jack J6 - Pin 1 that connects to the front panel meter for monitoring. The Visual + Aural Forward Power Sample at J2 enters the board which is tuned to produce a Visual Only Output Sample at Jack J7 - Pin 1 that connects to the front panel meter for monitoring. The Reflected Sample from J4 of the VHF Coupler connects to J4 of the Visual/Aural Metering Board and provides a Reflected Output Sample at Jack J9 - Pin 1 that connects to the front panel meter for monitoring.

SYSTEM CONTROL AND OPERATION The system control for the Translator consists of (A7) the Transmitter Control Board (1161-1109)

which provides control of the System Operation and the monitoring of the Status of the Tray and the System. The board provides or removes the commands for operation of the System. Associated with the Transmitter Control Board are front panel LEDs for monitoring of Operate (DS5)/Standby (DS6) and Auto (DS7)/Manual (DS8) Status, Thermal Interlock (DS3), VSWR Cutback (DS2), Input Signal Loss (DS1) Status and the Amplifier Status (DS4) of the High Band VHF Amplifier Board. If the Reflected Power Level increases above the set level of R44, the board will cutback the output Power Level. The board also contains (S1) a Receiver/Modulator Switch that must be switched to the proper position depending on if the System is a Translator and contains a Receiver Tray or is a Transmitter and contains a Modulator Tray. If the Receiver Tray is selected, DS4 will be lit and if the Modulator Tray is selected, DS5 will be lit.

- Page 2 of 3 -

Page 22

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Circuit Description

Also located on the front panel of the Tray is (CB1) the 7.5 Amp On/Off Circuit Breaker, which distributes AC to the two power supplies, the ±12 VDC and the +26 VDC, that are part of the Tray. The Front Panel Meter (A27) is able to be switched by S1 to read the % Visual Output Power, % Aural Output Power, % Visual + Aural Reflected Power, the Switching Power Supply Voltage, the ALC Reference Voltage or the AGC Detector Voltage.

A Front Panel Gain Control (R2) provides an ALC adjust which sets the Output Power level of the Transmitter.

The AC needed to operate the Tray connects to the IEC Connector (A1) located on the rear panel. The IEC Connector contains a 10 Amp over-current protection Fuse F1. The AC connects to TB1 which has jumpers for 115 or 230 VAC operation and MOV devices connected across the lines for surge and spike protection. The circuit breaker (CB1), which lights when switched on and AC is present to the Tray, controls the Input AC that connects to TB1. When CB1 is switched On the input AC connects to (A5) the step down Toroid for the ±12 VDC Power Supply. The AC is also connected to the contacts of the Isolation Relay (A2). The Isolation Relay controls the AC Voltage that is supplied to the Switching Power Supply which is needed for operation. The Isolation Relay is energized by a Relay Enable Command from the Transmitter Control Board and occurs when the System is switched to Operate and there is no Thermal Fault present. The Transmitter Control Board removes the Relay Enable Command to the Isolation Relay in the event of excessive temperature sensed by the Thermal Switch (A17-A3) mounted to the Amplifier Heatsink Assembly. The de-energized Isolation Relay removes the AC Input to the Switching Power Supply, which shuts down the power supply.

POWER SUPPLIES There are two power supplies in the Tray which provide the needed ±12 VDC and the +26 VDC for

the operation of the Tray and the Amplifier Boards. The ±12 Volt Power Supply is comprised of (A5) an AC Step-Down Toroid and (A6) a +12V(3A)/-12V Power Supply Board (1092-1206). The +12V(3A)/-12V Power Supply Board contains two full wave bridge rectifier networks, one for +12 VDC and one for -12 VDC. The board contains three nonadjustable regulator IC circuits with short circuit protection (U1, U2 & U3) for +12 VDC and one nonadjustable regulator IC circuit with short circuit protection (U4) for -12 VDC. The second power supply in the Tray is a +26 Volt Switching Power Supply Assembly (V250D04) that provides the +26 VDC to (A17-A1) the VHF High Band Driver Board and (A17-A2) the VHF High Band Amplifier Board.

- Page 3 of 3 -

Page 23

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Detailed Alignment Procedure

Use the IF Output of the Modulator or the Receiver Tray to drive the VHF Upconverter/Amplifier Tray.

The Upconverter/Amplifier Tray includes adjustments for automatic level control (ALC) of the drive level, linearity (amplitude pre-distortion) predistortion and the RF amplifier stages. The Upconverter/Amplifier Tray also includes adjustments for the local oscillator multiplier chain and the local oscillator center frequency.

Switch the Front Panel mounted On/Off Upconverter/Amplifier Circuit Breaker to the On position. Switch the Auto/Manual Switch to the Manual position. Switch the Operate/Standby Switch to the Standby position.

(A14) CHANNEL OSCILLATOR ASSEMBLY (1145-1202) CONTAINS: (A14-A1) CHANNEL OSCILLATOR BOARD (1145-1201).

1. Connect the ma in output of the Channel Oscillator (J1) to a spectrum analyzer, tuned to

the crystal frequency. Switch the Operate/Standby Switch to Operate, and peak the tuning capacitors C6 and C18 for maximum output. Tune L2 and L4 for maximum output. The output level should be approximately +5 dBm.

2. If a spectrum analyzer is not available, connect a DVM to TP1 on the x4 Multiplier Board.

Tune capacitors C6 and C18 for maximum voltage, then tune L2 and L4 also for maximum voltage output at TP1.

3. Connect the sample output of the channel oscillator (J2) to a suitable counter and tune

C11, coarse adjustment, and C9, fine adjustment, to the crystal frequency. DO NOT RE-PEAK C6, C18, L2 or L4, because it may change the output frequency.

NOTE: While adjusting C9 and C11 to the crystal frequency the peak voltage monitored at TP1 of

the x4 Multiplier Board should not decrease. If a decrease does occur a problem may exist with the crystal.

4. Reconnect the main output (J1) of the Channel Oscillator to the input (J1) of the x4

Multiplier.

(A15) x4 MULTIPLIER BOARD (1174-1112) While monitoring with a DC voltmeter, maximize each test point voltage by tuning the broadband

multipliers in sequence.

1. Monitor TP1 with a DVM and Tune C4 for Maximum.

Monitor TP2 with a DVM and Tune C6 and C10 for Maximum. Monitor TP3 with a DVM and Tune C12 then re -peak C4, C6 and C10 for Maximum.

2. Connect a Spectrum Analyzer, tuned to 4 times the crystal frequency, to the x4 Multiplier

output Jack (J2). Monitor the output and peak the tuning capacitors for maximum output.

The output of the x4 Multiplier connects to (A16-A1) the Filter/Mixer Board.

(A16-A1) FILTER/MIXER BOARD (1150-1102)

1. Monitor J4 the L.O. Output of the Board with a Spectrum Analyzer and adjust C12 and C18

for maximum output (+14 dBm) at the L.O. frequency.

2. Adjust C13 and C17 for best frequency response for the L.O. frequency.

- Page 1 of 5 -

Page 24

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Detailed Alignment Procedure

PRESET THE FOLLOWING SWITCHES:

(A10) ALC/AGC Board

S1 to ALC Manual S2 to AGC Manual

(A11) Linearity Corrector Board

S1 to Off

(A10) ALC/AGC BOARD (1067-1116) The Input IF signal is cabled to (J1) IF input of the ALC/AGC Board.

1. Remove the J1 plug from the board, observe that DS2, Input Fault, lights. Reconnect J1

and observe DS2 extinguished.

2. Check that S1 is in Manual. Monitor the output at J2 with a Spectrum Analyzer and adjust

R17 for 0 dBm level.

3. Insert a NTSC multiburst video test signal to the Modulator Tray and tune C2 for a flat

frequency response ±.5 dB. Reconnect J2. Jack (J2) of the board is cabled to the J1 Input Jack of the Linearity Corrector Board.

(A11) LINEARITY CORRECTOR BOARD (1161-1116) Check that the linearity pre-correction (S1) is switched Out.

1. Monitor the Output Connector (J2) of the Linearity Corrector Board and verify an IF output

of approximately 0 dBm level.

No other adjustments are necessary to the linearity corrector at this point of the procedure. The IF output of the Linearity Corrector Board is fed back to the ALC/AGC Board at connector (J3).

(A10) ALC/AGC BOARD (1067-1116)

1. Switch S1 on the ALC/AGC Board to ALC Auto. This completes the ALC loop.

2. The initial ALC IF adjustment consists of presetting the Front Panel Power Control Pot (R2)

to Mid-Range and adjusting the ALC reference pot (R47) to obtain a detected IF output level of +2 VDC at TP3 of the ALC/AGC Board. Switch the Operate/Standby Switch to the Operate position.

3. Remove the IF output plug (J4) from the ALC/AGC Board, and monitor the output from J4

with a Spectrum Analyzer. Adjust R101 for (-3 dBm pk Visual and -13 dBm Aural).

4. Insert a NTSC multiburst video signal to the Input of the Modulator or to the Receiver Tray

and tune C33 for a flat frequency response ±.5 dB. Reconnect J4. The output from J4 is cabled to J2 the IF input of (A16) the Mixer/Amplifier Enclosure

Assembly which connects to J7 of (A16-A1) the Filter/Mixer Board.

- Page 2 of 5 -

Page 25

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Detailed Alignment Procedure

THE FOLLOWING DETAILS THE MEANING OF EACH LED ON THE ALC/AGC BOARD WHEN ILLUMINATED.

DS2 - Abnormally low or no IF signal is present at the IF input c onnector J1. DS3 - Indicates that the ALC circuit is unable to maintain the signal level requested by the ALC

reference. Usually caused by excessive attenuation in the Linearity Corrector path or Switch S1 is in Manual ALC.

DS4 - Indicates that the AGC circuit is unable to maintain the signal level requested by the AGC

reference. Usually caused by excessive attenuation in the Amplifier Circuits or Switch S2 is in Manual AGC.

DS5 - A Mute command is present. Typically generated when the Translator is in Standby.

(A16-A1) FILTER/MIXER BOARD (1150-1102) The L.O. signal and the IF signal are mixed to produce the desired channel frequency which is the

difference product of the two signals. The output of the Mixer at J6 (-14 dBm) is jumpered to J1 the input to a bandpass filter located on the Board. This filter has been factory swept and adjusted for a 6 MHz bandwidth and should not be tuned without proper equipment.

The output of the Filter is amplified by U1 to (-2 dBm) and is fed to the Filter/Amplifier Board.

(A16-A2) FILTER/AMPLIFIER BOARD (1150-1101) The Filter/Amplifier Board has been factory swept and adjusted for a 6 MHz bandwidth and should

not be tuned without proper equipment. The filtered output connects to J1 of the board and is amplified by U1 to +8 dBm Visual and -2 dBm

Aural in level. Adjust R9 for a Nominal output of +8 dBm Visual -2 dBm Aural. The output is fed to the VHF High Band Driver Board (A17-A1).

(A17-A1) VHF HIGH BAND DRIVER BOARD (1174-1107) This amplifier has a gain of about 18 dB and is tuned with C15 for maximum output at the VHF

Channel Frequency. The RF output (+26 dBm Visual and +16 dBm Aural) is fed to the VHF High Band Amplifier Board (A17-A2).

1. Adjust the operating static current to .6 Amps with R4 located on the Board. This is accomplished by adjusting R4 for 600 mA, .06 Volts across R6, a .1 Ohm/3 Watt Resistor.

The RF output (+44 dBm Visual and +34 dBm Aural) is fed to the Amplifier Board.

(A17-A2) VHF HIGH BAND AMPLIFIER BOARD (1174-1101) The amplifier has a nominal gain of 18 dB and is tuned with C9 & C19 for maximum output.

1. Adjust the operating static currents for Q1 to 2 Amps for each half of the device, 4 Amps total. This is accomplished by presetting Pots R5 and R9 full CCW then adjusting R5 for a .2 Volt, 200mV, drop across R21, a .1W/5W Resistor, located on the Amplifier Board. Next adjust R9 for .4 Volt, 400mV, drop across R21. This gives the desired 4 Amps of Static Current for the Q1 Device.

- Page 3 of 5 -

Page 26

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Detailed Alignment Procedure

The output of the Amplifier Board at J2 (+44 dBm Visual and +34 dBm Aural) is fed to the Low Pass Filter Board.

(A18-A1) LOW PASS FILTER BOARD (1174-1102, 1174-1103 OR 1174-1104) The Low Pass Filter Board is adjusted at the factory and should not need to be adjusted in the

field. The second part of the Board is a 2nd Harmonic Trap that is also factory adjusted and should not be adjusted.

The output of the Low Pass Filter Board at J2 is fed to a Trap Filter Board.

(A18-A2 & A18-A3) TRAP FILTER BOARDS (1174-1105 OR 1174-1106) The two Trap Filter Boards are adjusted at the factory and should not need to be adjusted in the

field. Each board contains two Notch Circuits. The Center Frequency of first notch, -4.5 MHz, is adjusted by C8, and the depth of the Notch is adjusted by C6. The Center Frequency of second notch, +9 MHz, is adjusted by C4, and the depth of the Notch is adjusted by C2. Both boards are adjusted the same.

The output of the Trap Filter Board at J2 is fed to a High Band VHF Coupler Board.

(A23) HIGH BAND VHF COUPLER BOARD (1141-1002) Forward and Reflected power samples are taken from the VHF Coupler Board and the Reflected

Sample is fed directly to the Visual/Aural Metering Board (A26). The Forward sample is split by (A24) and fed to the Visual/Aural Metering Board (A26).

The Output of the VHF Coupler Board (A23) is connected to the RF Output Jack (J4) of the Tray (+43 dBm Visual and +33 dBm Aural).

(A26) VISUAL/AURAL METERING BOARD (1161-1103)

1. While monitoring the RF output of the Tray, adjust R101 on the ALC/AGC Board (A10), S2 in AGC Manual, for a reading of 20 Watts Peak Sync Power.

2. Switch the Front Panel Meter AGC Detector Voltage Position and adjust R28 for .3 Volts.

3. Switch the Front Panel Meter to the % Aural Output Power position and adjust C5 for Maximum Aural Output.

4. Adjust R11 for a reading of 100% Aural Output on the Front Panel Meter.

5. Remove the Aural by removing Jack J15 located on the Clamp/Modulator Board in the Modulator Tray or by removing the Aural from the RF Input to the Receiver Tray. Switch the Front Panel Meter to the Visual Output Power position and adjust R29, located on the Visual/Aural Metering Board, for a reading of 100% on the front panel meter.

6. Insert the Aural back into the System. Adjust R39 for 100% Output in the Visual Output Power position.

Remove the cable now on J4 and move the cable from J1 to J4. Switch the Meter Selector Switch to the % Reflected Power Position and adjust R47 for a reading of 100%. Switch the cable from J4 back to J1 and reconnect the cable to J4.

- Page 4 of 5 -

Page 27

117B 20 Watt VHF High Band Translator Upconverter/Amplifier Tray

Detailed Alignment Procedure

(A7) TRANSMITTER CONTROL BOARD (1161-1109) The adjustments on the Board were set at the factory and should not be realigned. (A9) AGC CONTROL BOARD (1137-1201) The AGC Control Voltage is adjusted by R3 for 1 VDC at TP3. Switch S2 located on the ALC/AGC Board back to Automatic for normal operation and adjust R96

for a reading of 100% in the Visual Output Power position.

(A6) +12V(3A)/-12V POWER SUPPLY BOARD (1092-1206) The Board contains no adjustments.

(A3) +26 VDC SWITCHING POWER SUPPLY ASSEMBLY (V250D04) The Assembly was factory adjusted for the proper voltage (+26 VDC) needed by the amplifier

boards. If the Switching Power Supply should shut down due to a problem in the Tray, after the problem is repaired, the supply can be reset by turning the Tray Off, waiting a moment, then turning it On again.

This concludes the Detailed Alignment Procedure for the Upconverter/Amplifier Tray. For normal operation, the Auto/Manual Switch located on the front panel, should be in the Auto

position. S1 and S2 located on the ALC/AGC Board should both be in the Auto Position.

- Page 5 of 5 -

Page 28

117B 20 Watt VHF High Band Translator Drawing List (Subassemblies)

Drawing List (Subassemblies)

±12V Power Supply Board

Schematic

IF Filter/Amplifier Board

Schematic

VHF Channel Filter, Low Band

Schematic

VHF L.O. Filter, Wide, 2 Section

Schematic

VHF Mixer/Amplifier Board

Schematic

ALC/AGC Board

Schematic

+12V(3A)/-12V Power Supply Board

Schematic

IF ALC Board, 45.75 MHz

Schematic

..................................................................................................

1001-3009

1005-3205

1034-3202

1034-3211

1035-3901

1067-3116

1092-3206

1109-3402

AGC Control Board

Schematic

Channel Oscillator Board, Dual Oven

Schematic

VHF Filter/Amplifier Board

Schematic

VHF Filter/Mixer Board

Schematic

IF Filter Board, 45.75 MHz

Schematic

Visual/Aural Metering Board

Schematic

Transmitter Control Board

Schematic

Linearity Corrector Board

Schematic

x2 Multiplier Board

Schematic

..................................................................................................

1137-3201

1145-3201

1150-3101

1150-3102

1161-3007

1161-3103

1161-3109

1161-3116

1172-3111

VHF High Band Amplifier Board, +28V I/P

Schematic

..................................................................................................

1174-3101

- Page 1 of 2 -

Page 29

117B 20 Watt VHF High Band Translator Drawing List (Subassemblies)

VHF Low Pass Filter Board, 174-192 MHz

Schematic

VHF Low Pass Filter Board, 193-216 MHz

Schematic

VHF Low Pass Filter Board, 217-238 MHz

Schematic

VHF Trap Filter Board, 174-216 MHz

Schematic

VHF Trap Filter Board, 217-238 MHz

Schematic

VHF High Band Driver Board

Schematic

x4 Multiplier Board

Schematic

Downconverter Filter Board

Schematic

..................................................................................................

1174-3102

1174-3103

1174-3104

1174-3105

1174-3106

1174-3107

1174-3112

1227-3502

Dual Stage Amplifier Assembly

Schematic

IF ALC Board

Schematic

X2 Multiplier Board

Schematic

+26V/250W Switching Power Supply, located in Upconverter/Amplifier Tray

..................................................................................................

1227-3501

1227-3504

1227-3524

.....................

V250D04

- Page 2 of 2 -

Page 30

117B 20 Watt VHF High Band Translator Maintenance

The 117B is designed with components that require little or no periodic maintenance except for the routine cleaning of the Trays. The amount and time interval between cleanings depends on the conditions within the Transmitter room. The air flow through the cabinets will be lowered which could cause heat related problems if the fans in the Cabinet are not cleaned. Clean them with a vacuum cleaner to remove any foreign material which may have accumulated.

The individual Trays in the Translator must also be cleaned. The amount and time interval between cleanings depends on the conditions within the Transmitter room. While the electronics have been designed to function even if covered with dust. A heavy buildup of dust, dirt or insects will hinder the effectiveness of the cooling of the components and lead to a thermal shutdown or premature failure of the affected Tray.

When the front panels become dust covered, the top covers should be removed and any accumulated foreign material removed. A vacuum cleaner utilizing a small wand type attachment is an excellent way to suction out the dirt. Alcohol and other cleaning agents should not be used unless your certain that the solvents will not damage components or the silk-screened markings on the Trays and boards. Water based cleaners can be used, but do not saturate the components. The fans and heatsinks should be cleaned of all dust or dirt to permit the free flow of air for cooling purposes.

It is recommended that the operating parameters of the Translator be recorded from the front meter on the Upconverter/Amplifier Trays at least once a month. It is suggested that the data be recorded and that it be retained in a rugged folder or envelope for the life of the equipment. A sample format for a Log Sheet is included in this section. Photocopies of the Log Sheet should be made for continued data entries.

Page 31

117B 20 Watt VHF High Band Translator Maintenance

LOG BOOK FORMAT

117B 20 WATT VHF HIGH BAND TRANSLATOR

MODEL NUMBER: 117B SERIAL NUMBER: DATE UNIT INSTALLED: BY:

DATE TAKEN: BY:

20 WATT VHF UPCONVERTER/AMPLIFIER TRAY METERING NORMAL

% Visual Power 100% % Aural Power 100% % Reflected Visual Power <10% Power Supply Voltage +24VDC AGC Detector Voltage +.3 VDC ALC Detector Voltage +2 VDC

OPERATING STATUS LEDS

DRIVER AMPLIFIER ON OUTPUT AMPLIFIER ON THERMAL INTERLOCK ON

FAULT STATUS LEDS

INPUT LOSS OFF VSWR CUTBACK OFF

FAN OPERATION OK ASSEMBLY CLEANED ROOM TEMP. 70° F AC LINE 230/

115VAC

RECORD OF REPAIRS AND OBSERVATIONS: (Indicate the dates and person doing repairs.)

UBS Axcera 117B User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual