Harris Broadcast Flexiva FAX 5KW, Technical Manual

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FAX 5/10/20/30/40KW
October 28, 2013
3 ‐ 23
888 ‐ 2720 ‐ 001 WARNING: Disconnect primary power prior to servicing. Copyright ©2013, Harris Broadcast
Note
Under normal conditions the airflow % typically will be between 75 and 90 %.
3.9.8 SETUP>TX CALIBRATE>PWR BLOCK CAL
This procedure is not in the FAX5/10 menu since there is only one power block and it is calibrated using the TX PWR
CAL menu. In a FAX20/30/40 there will be multiple power blocks and voltages for each will appear in the menu. See
Section 5 of this manual for detailed power block calibration procedure.
The power block power cannot be measured directly with an in ‐ line meter, so the power will be estimated based on
transmitter power which should be calibrated prior to calibrating the power block. The power block should be
calibrated at the 2 % above power block power. The following example is for FAX20@ 20 kW:
(TX TPO/# of power blocks) + 2%
(20000/2) = 10000
10000 +(10000* 2%) = 10,200 Watts
The 2% is an estimate of loss in the splitting and combining systems within the FAX.
Table 3-12 SETUP>TX CALIBRATE>AIRFLOW SET
Menu SubMenu Description
PB1 AIRFLOW AIRFLOW Airflow Voltage to ADC (Display Only)
AIRFLOW CAL % of airflow currently being measured by transmitter
SET PB1 100% YES or NO;To set airflow the transmitter fans should be running full speed
which is 100% airflow.
Table 3-13 SETUP>TX CALIBRATE>PWR BLOCK CAL
Menu Description
UNIT PWR 10200W; Power that the power block will be calibrated to.
CALIBRATE YES or NO
PB1 FWD 3.50 V; Calibration reference voltage for power block forward power
PB1 RFLD 1.73V; Calibration reference voltage for power block reflected power
PB2 FWD 3.50 V; Calibration reference voltage for power block forward power
PB2 RFLD 1.73V; Calibration reference voltage for power block reflected power