ashtech Z-Surveyor Operation And Reference Manual page 26

Number
14
Table 2.2: Z-Surveyor Rear Panel Description (continued)
Component
3 Serial Ports
• A
• B
• C
• D
4 External Frequency
Reference connector
5 GPS Antenna
connector
Function
Each port delivers a 12V output on pin 1 for Radio Modem
Power Up. The total power delivered by all connectors is
1A, at 50% duty cycle, 250ms duration. In case of a short-
circuit, the power is internally fused—the fuse has been
tripped requiring the removal of the short-circuit prior to
activation of this power.
• A complete RS-232 port with full-handshaking. Port
A can be used for communications with a Husky hand-
held computer, an IBM compatible PC, or a radio. Port
A is used for transferring data from the receiver to a
computer, from a receiver to a receiver, and all other
communications to and from the receiver.
• A complete RS-232 port with full-handshaking. Port B
can be used for communication with the Husky hand-
held computer, an IBM compatible PC, or a radio. Port
B is used for transferring data from the receiver to a
computer, from a receiver to a receiver, and all other
communications to and from the receiver. This port
also carries an Event Marker Input on pin 7.
• A complete RS-232 port with full-handshaking. Port C
can be used for communication with the Husky hand-
held computer, an IBM compatible PC, or a radio. Port
C is used for transferring data from the receiver to a
computer, from a receiver to a receiver, and all other
communications to and from the receiver. This port
also carries a 1PPS output on pin 7.
• A complete RS-232 port with full-handshaking. Port
D can be used for communication with the Husky
hand-held computer, an IBM compatible PC, or a
radio. Port D is used for transferring data from the
receiver to a computer, from a receiver to a receiver,
and all other communications to and from the receiver.
When the internal Spread Spectrum Radio is installed,
this port is disabled.
Allows input of external reference clocks
Input frequencies: 5MHz, 10MHz, or 20 MHz sinusoidal
Input Power Range: 10 dBm to 20 dBm.
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 Z-Surveyor 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.
Z-Surveyor & Z-FX Operation Manual