Lectrosonics UCR200d User Manual download pdf (Page 6)

FRONT PANEL CONTROLS AND FUNCTIONS

POWER LED

When lit, this LED indicates that power is applied to the UCR200D

and adequate voltage is present to operate the unit.

PILOT LED

The audio output muting (squelch) function of the UCR200D is

controlled by a 32kHz tone modulation of the RF carrier. The

audio output is muted until this tone is present. This green LED

will remain on as long as the receiver audio is enabled by the pilot

tone.

TRANSMITTER MOD LEVEL METER

When the meter function switch is in the Mod position, the modu-

lation (audio level) of the incoming signal is indicated by a fast

responding LED strip. The strip is calibrated in 6dB steps over an

expanded scale (54dB) which provides an extremely accurate

visual “picture” of the signal dynamics, even at a distance away

from the receiver. Audio signal peaks easily exceed the response

time of VU meters, however, the LED strip is fast enough to track

even brief transients.

RF LEVEL INDICATORS

With the meter function switch in the RF position, the LED strip

indicates the level of the incoming RF signals. The LED strips are

calibrated to provide accurate indications from 1uV to 1mV. The

LEDs are highly visible from a distance, making antenna set up

more accurate. The LED strip is especially useful in

“troubleshooting” difficult antenna installations.

POWER SWITCH (and PILOT DISABLE)

This slide switch, and its corrosponding LED indicator, switches

the receiver from Off to On with Pilot enabled or ON with Pilot

disabled. The pilot LED will glow green when pilot tone is

present, With the switch in the “ON (Pilot Off)” osition, the LED

will glow red. At turn on and off there is a delay built into the

receiver to allow various stages to stabilize before the audio output

is activated. This will prevent an audio “thump” when powering

up the receiver.

PILOT TONE DISABLE

The Power switch on the front panel is the Pilot Tone Disable.

This is a three position switch. The position toward the right (as

seen looking straight at the front panel) is the normal operating

position and allows the pilot tone to enable or disable the receiver

audio output. The other position, toward the left, will disable the

pilot tone action and will cause the receiver audio output to always

be enabled, even in the absence of a transmitter signal. This

position is only used for troubleshooting and should never be set

during actual use. When the pilot tone is disabled with this switch,

the Mod meter on the front panel is also disabled.

AUDIO OUTPUT LEVEL CONTROL

The front panel Audio Output Level control will adjust the audio

output within the range set by the Lo/Mid/Hi range switch (located

on the rear panel.) In the Low position the adjustment range is

from –50dBm to –20dBm, the High position (center) allows an

adjustment from –30dBm to 0dBm, and the Fixed position sets the

audio output to a fixed +8dBm with no front panel control.

ANTENNA CONNECTORS

These are standard 50 Ohm BNC type jacks for the RF input to the

receiver. The left jack is the main antenna (0) and the right jack is

for the diversity antenna (180).

ANTENNA PHASE LEDs

These two LEDs labeled “0” and “180” show the phase difference

of the signals being received at the two antennas.

MOD

1mV

10uV

-42

1uV

-36 -30

POWER

100uV

-12-18-24

-6

0dB

PILOT

0 180

MAIN DIVERSITY

(PILOT OFF)

OFF

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Lectrosonics UCR200d User Manual Page 6

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