ashtech Z-FX, Operation And Reference Manual

Page: 33 / 94

Equipment Description 21
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Pinouts
Z-FX
Because the pinouts of this receiver and the Z-Surveyor are the same, refer to
“Pinouts” on page 15.
Z-FXHE
Power
GPS Antenna connector The RF connector is a standard TNC-type female receptacle wired
for connection via 50-ohm coaxial cabling to a GPS antenna with an
integral LNA. The connector shell is connected to the receiver
common ground. The TNC-type connector center pin provides
+5VDC (to power the LNA) and accepts 1227 and 1575.42 MHz RF
input from the antenna; the RF and DC signals share the same path.
CAUTION
The current for the GPS antenna connector is limited to 150mA out of the RF
center conductor. It is short-circuited protected. If using a splitter or other
RF network, use an inner DC block suitable for 1-2 GHz, 50 ohms, maximum
voltage back to the Z-FX/Z-FXHE cannot exceed 15V.
Table 2.7: Pinouts for Power Connector
Pin Signal Description
1 EXT_INP Power Input 10-28 VDC
2 EXT_GND External Ground
3 N/A Not Connected
Table 2.6: Z-FXHE Rear Panel Description (continued)
Component Function