Adcom GTP-740 Service Manual

3
ALIGNMENT PROCEDURES GTP-740
AM SECTION
AF Modulation: 400 Hz, 30%.
For AH version, store frequencies 603, 999, 1404 kHz.
For C & B versions, store frequencies 600, 1000, 1400 kHz.
Connect 22 pF ceramic to capacitor between signal generator and antenna terminal.
OSCILLATION TUNING VOLTAGE
Connect DVM between M211 & GND.
Tune to 603/600 kHz.
Adjust L205 for 1.75 ± 0.05 V reading on DVM.
I.F.
Apply 999/1000 kHz, set 45 dBm to antenna input.
Tune to 999/1000 kHz.
Adjust L207 for maximum output.
R.F.
Apply 603/600 kHz, 45 dBm.
tune to 603/600 kHz.
Adjust L206 for maximum output.
Apply 1404/1400 kHz, 45 dBm.
Adjust C220 for maximum output.
Repeat until no further improvement.

Adcom GTP-740 Specifications

General

Brand	Adcom
Model	GTP-740
Category	Amplifier
Language	English