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Vector-LP – Adding Standby Side
Issue 1.0
FM10011
3 Turning On the standby side
3.1 NDB Applications
(a) Remove any ac power “lock out” devices and apply ac power (and dc power source, if
applicable) to the transmitter.
(b) Terminate the transmitter’s RF output in a suitable 50 ohm dummy load.
(c) In the Changeover Control menu, set Monitor mode to BYPASS and Main side to A.
NOTE
When a replacement exciter monitor/generator PWB has been installed, all audio settings
must be re-entered so the values are written into the PWB’s RAM.
(d) In the Peripherals -> Keyer Settings -> Audio Levels menu, decrease the Keying Pot
value by 1 and press
Done
. Then increase the Keying pot value to its original value and
press
Done
.
(e) In the Peripherals -> Keyer Settings -> Keyer Modulation menu, toggle the tone
frequency. Toggle the Tone Frequency again so it returns to the original setting. Also
toggle Modulation, Keyer and Tone Generator OFF and then ON.
(f) Record all the settings in the Peripherals -> Keyer Settings -> Keyer Sequence menu,
including Frame Sequence, Keyed String, Frame Format and Frame Timing.
(g) Record all the settings in the Peripherals -> Keyer Settings -> Standby Code 1 and
Standby Code 2 menus.
(h) Set the transmitter RF output power to 0 W (press
Power Increase
and
Decrease
buttons at the same time).
(i) Press
RF On
and increase the RF output power to 25 W.
(j) Record the modulation depth (Mod %) from the GUI’s Meters screen.
(k) Connect an oscilloscope or frequency counter to the RF synthesizer PWB’s output
(A5TP7) and verify the transmitter is operating at the correct carrier frequency.
(l) In the Changeover Control menu, set the Main side to B so that the transmitter switches
to operate on side B.
(m) Verify the transmitter RF output power is 25 W. If the transmitter power is not 25 W,
adjust
GAIN TRIM
potentiometer R31 on the side B interphase PDM driver PWB (A9)
until the output power is 25 W.
(n) Again measure the modulation depth (Mod %) from the GUI’s Meters screen. If the
modulation depth is not the same as measured in step 3 (j) change the Side B Scale
value (in the Peripherals -> Keyer Settings -> Audio Levels menu) until the modulation
level is the same as it was in 3 (j). Ensure the Side A Keying Pot value is restored to its
initial value (see 3.6.13.1 in the Vector-LP manual).
Summary of Contents for FM10011
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