DANIELS
ELECTRONICS LTD.
TM
4-4
IM10-VR3H040-AB VHF Enhanced Extra Wideband Receiver Instruction Manual
Continue to decrease the jumper position one "bit" at a time until the synthesizer regains lock
with TP4 adjusted (C24) for +2.3 Vdc
.
If the tuning voltage remains lower than +2.3 Vdc,
increase the jumper setting by 1 "bit" position and re-adjust C24 in an attempt to achieve
+2.3 Vdc at TP4
.
Repeat this procedure until +2.3 Vdc is achieved at TP4.
It is important to check the loop control voltage at TP4 when multiple synthesizer channels have
been programmed
.
All channel selections should result in a TP4 voltage within a +1.0 to
+4.0 Vdc range
.
Adjust the fine-tuning capacitor C24 to center multiple channel voltages
symmetrically about +2.3 Vdc. Channel selections beyond the tuning range capability of the
synthesizer will result in unlocked operation
.
The tuning range capability of all synthesizer
models is listed in the Specifications section (1.4) of this manual.