User Instructions

15
HBM: Business Document
Functional overview of the evaluation unit (See fig. 6.1)
Item
Function description
1
Display
Shows analog output voltage. For monitoring only - accurate measurement values to
be read out on the output BNC connector
2
LED power
The LED indicates the on/off status of the device
3
LED RF-level
The LED indicates an acceptable RF signal strength from the transmitter
4
BNC output
Voltage ±10V / frequency 10kHz±5kHz (select with switch no. 12)
5
Potentiometer „offset“
Potentiometer for offset correction within the range of ±1V
6
Main switch
On / off switch (self-locking, pull to switch)
7
Supply voltage (+)
9 V….36 V DC
8
Supply voltage
GND
9
RF output (+)
Analog output correla1ng to the strength of the received RF-Signal. Acceptable RF-
Level is received, when voltage is above 3,4V
10
RF output GND
Ground connec1on of the telemetry system. Connect with main ground of vehicle / test
field
11
Stator-connection
Female connector for cable to stator unit
12
“Analog / frequency” output switch
Switch for setting the output format of the measurement signal.
Analog: ±10V, frequency: 10kHz ±5kHz TTL
13
Filter switch
Changes the filter frequency on output between 1.000Hz and 100Hz (-3dB). For slow
signals set on 100 Hz to get extra low noise signals.
14
Mode switch „measure / offset“
Switch up to „measure“: Normal measuring mode. The offset can be adjusted with the
potentiometer
Switch down to „offset“: The Control Unit generates internally an exact 0V output signal
which is only affected by the offset potentiometer. So the offset value can be precisely
determined and re-adjusted by setting any desired value.
15
Shunt cal-function on (push button)
Push button to release shunt cal-function. Cal-function will be released for app. 5
seconds (the orange LED above the button is activated for this time span).
Table 6.1: Functions of the evaluation unit