Ranger SS-3900EGHP, Manual

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4.0 REQUIRED TEST EQUIPMENT
DC Power Supply (13.8VDC, 10A)
RF Wattmeter (25~60 MHz, 50W)
Multimeter (Digital)
Automatic Modulation Meter
Audio Signal Generator Frequency Counter (100 MHz)
RF Signal Generator (100 MHz)
Automatic Distortion Meter
Oscilloscope (50 MHz)
Sinad Meter
4.1 ALIGNMENT PROCEDURES
This transceiver has been aligned at the factory and does not require any adjustments at installation.
The required test equipment listed are used for the test setup or alignment shown in Figure 4-1
Transmitter Test Setup and Figure 4-2 Receiver Test Setup. These test setups are used in part or total
during the following adjustments and refer to Page 15 for adjustment location.
4.1.1 PLL ALIGNMENT
ITEM U.U.T. SETTING
ADJUST
POINT
MEASUREMENT
VCO Disconnect “short PCB” from TP7, TP8 & TP9.
Set radio to A band, CH 1 AM RX mode.
Set COARSE/FINE control at 12 o’clock.
Connect Multimeter to TP2(R116).
L17
1.6 VDC
±
0.1
Set radio to 25.615 MHz & 28.305MHz.
Connect Oscilloscope to TP3(R74).
L18
Maximum Output and
Balance
AM Frequency Set radio to A band, CH 1 AM RX mode.
Connect Frequency Counter to TP3(R74).
L19
14.9200 MHz + 20Hz
USB Frequency Set radio to A band, CH 1 USB RX mode.
Connect Frequency Counter to TP3(R74).
L20
14.9225 MHz + 20Hz
LSB Frequency Set radio to A band, CH 1 LSB RX mode.
Connect Frequency Counter to TP3(R74).
L21
14.9175 MHz + 20Hz
TX Frequency Set radio to A band, CH 1 AM TX mode.
Connect Frequency Counter to TP3(R74).
VR21
14.9200 MHz + 20Hz
AM OSC Set radio to A band, CH 1 AM TX mode.
Connect Frequency Counter to TP5(D62).
L26
10.6950 MHz + 10Hz
SSB OSC Set radio to A band, CH 1 USB TX mode.
Set radio to A band, CH 1 LSB TX mode.
Modulation off.
Short TR31 (Collector & Emitter).
Connect Frequency Counter to TP6(R102). L27
L28 10.6925 MHz + 10Hz
10.6975 MHz + 10Hz
4.1.2 TRANSMITTER ALIGNMENT
ITEM U.U.T. SETTING
ADJUST
POINT
MEASUREMENT
BIAS Current Set radio to A band, CH 1 USB TX mode.