7807Lt-2 Controlled Parameters; Adjusting The Rf Input Power Alarm; Selecting The Input Gain Mode - evertz MultiFrame 7700 Manual

7700/7800 MultiFrame Manual
7807LT-2 Dual Wideband RF Fiber Transmitter
6.1.

7807LT-2 CONTROLLED PARAMETERS

To change the 7807LT-2 parameters, select the CTRL menu item in menu level 1. The toggle switch may
then be used to select the parameter to change as described below.

6.1.1. Adjusting the RF Input Power Alarm

The 7807LT-2 measures and can display the input RF power over a range of 0dBm to –60dBm in
increments of 1dBm. Alarms may be set for high and low input RF power that will appear locally on the
card edge LEDs (see Section 4) and remotely via SNMP traps. To set the alarm threshold points, select
the CTRL menu item in the first menu level and then use the toggle switch to display the RFTH option
and press the pushbutton to select it.
CTRL
RFTH
LWR
CH1/CH2
0 to –60 dBm
CTRL
RFTH
UPPR
CH1/CH2
0 to -60 dBm

The 7807LT-2 will not allow threshold settings where the lower threshold is greater
than the upper threshold.

6.1.2. Selecting the Input Gain Mode

The 7807LT-2 has two gain modes available:
Manual gain mode allows the user to select a fixed gain level for the RF signal.
AGC (automatic gain control) will maintain a constant output level even if the input RF level changes, as
long as this input level does not go outside of the AGC hold range (the 7807LT-2 has from 0 to +31.5 dB
of gain available to automatically apply to the incoming signal to maintain the target level). The AGC
target level is user adjustable (see Section 6.1.6).
To select the gain mode, select the CTRL menu item in the first menu level, then use the toggle switch to
display the MODE option and press the pushbutton to select it.
CTRL
MODE
CH1/CH2
AGC
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Lower RF power alarm threshold (default -60
0 to –60 dBm
dBm).
Upper RF power alarm threshold (default 0 dBm).
0 to -60 dBm
AGC mode (default).
AGC
Manual mode.
MAN
Revision 1.2