R.V.R. Elettronica PTX30 UHT/S3, Руководство пользователя

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PTX30 UHT /S3
30 / 36 User Manual Rev. 5.0 - 10/12/2001
9.6 Modmeter
You can find this board on the left side of the front panel.
This circuit displays the frequency deviation of your signal, measuring the rectified
audio signal that is injected in the VCO’s varicaps.
A switch selects the gain of the meter between two levels (100% and 10%), thus
obtaining a more exact reading over low deviation levels (e.g.. SCA RDS Pilot
Tones).
Another switch selects the bar mode or the dot mode.
This display is comprises of 14 green LEDs and 6 red LEDs; in the 100% mode we
will have a 100 Khz full scale (75KHz at the first red led) with a span of 5 Khz/led
and in the 10% mode a span of 0.5 Khz/led.
9.7 Anameter
This circuit is comprises of two pcb’s and a meter placed on the right side of the
front panel.
It measures and displays the various parameters of the exciter: audio input levels,
internal voltages and currents, direct and reflected power and varicap voltage.
Each type of measurement is indicated by an appropriate led.
These measurements are performed using the various scales available on the
instrument:
MEASUREMENT SCALE FULL SCALE
Audio level dB +3dB
Voltages V 30V
Currents A 6A
Direct Pwr W 50W
Reflected Pwr W 10W
On this board we have also the two red alarm LEDs, whose signals come from the
main card for the "UNLOCK" led and from the power supply for the "SWR" led; the
Power On led, the power regulation trimmer and the mains switch.