SGC SG-2020 TEST DOCUMENT Test Manual page 8

Reverse Power
7.6 Depress 'REV' while transmitting 20W into a dummy load and verify
that 2 LED's light.
7.7 Depress 'REV' while transmitting 20 W without any antenna or
dummy load connected and verify that all 10 LED's light.
(NOTE: Do not transmit for more than 5 sec. Watch the current meter, it
should be reduced to less than 2 Amps by the ALC/REV protection cir-
cuitry)
8.0 POWER CALIBRATION TEST
This test will check/readjust the radio for max. 20W RF OUT .
8.1 Set P for 20 watts after setting the frequency to 14150.0 KHz.
8.2 Set power to M (maximum)
8.3 Attach the radio to a 50-ohm dummy load.
8.4 Key mic and increase audio input level (1.3 KHz, and not more than 20
mV) until maximum power is achieved (just below the saturation
level.)
8.5 Press ('CMD' + 'NB') and adjust RF out to 20W on watt meter. Read
the P value on the display and press 'MEM' button.
Load P Value in all 20 channels
8.6 Go to Channel 1 frequency, press ('CMD'+'NB') and adjust knob for
the new power setting P(from above) and then press 'MEM' to store
this P value temporarily (for as long you are in this channel). Press
('FAST'+'MEM') together for storing permanently this value in this
channel's memory.
8.7 Repeat the above step for the remaining 19 channels/frequencies.
9.0 TRANSMITTER RESPONSE (into a 50 ohm dummy load)
NOTE: Power response and spurs readings can be taken at the same time.
Power response (Avoid continuous TX for more than 10 sec.)
9.1 Set display for 1800.0 KHz, USB and key in transmit.
9.2 Increase audio generator level until maximum power is achieved
while staying within the limits of ALC, current, and voltage values
indicated on the table on the following page.
9.3 Repeat the above steps for all frequencies in the table on the following
page, and measure input drive, input DC voltage, ALC voltage and
output power and compare these readings with the values and limits
set.
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P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259 7331
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© 2001 SGC Inc