NOVATECH INSTRUMENTS, INC.
2960AR/2965AR Manual, 13-Jul-2004
2.12
: AC power is applied and on.
: Green: Oscillator is locked.
Red: Warm-up.
: Locked to and tracking a 1pps input.
2.13
GPS1: Matching GPS smart antenna system.
The 2960AR and 2965AR line power input
connection is provided with a 3-wire cord. Do not
defeat the grounded conductor.
3.1
Verify that the rear panel
indicates your line power (120VAC or 240VAC
50Hz/60Hz). Connect the provided 3-wire line cord
to your power source. The power switch is built-in
to the input module on the rear panel.
3.2
The 2960AR requires no
user setup beyond the application of line power and
connection to your application. Connect your 50Ω
coaxial cables to the appropriate front panel BNC.
See below for 1pps connections and use.
If you plan to use your 2960AR or 2965AR as part of
a calibration system or house standard, it is
suggested that it be powered from an
uninterruptable power supply (UPS) (along with
your 1pps source, if used).
3.3
RS232 Installation (2965AR only).
To use the
2965AR internal synthesizer with the RS232 serial
interface, connect your host computer to the 9-pin
rear-panel connector with the provided cable. Please
note that the data
the 2965AR is on pin 3; the
data
the 2965AR is on pin 2 and the
return is on pin 5. Set your host to 19.2 kbaud,
8 bits, 1 stop bit, no parity and no hardware flow
control. See Table 2 for RS232 Serial Commands.
The 2965AR is provided with a 2 meter RS232 cable.
If you require a different length, please note that a
DB9 male-to-female, straight-through connection is
required. Only pins 2, 3 and 5 are used.
3.4 The serial commands are not case sensitive.
There must be a space after each command except R,
C,S, Qr and Qe. End with any combination of
CR, LF or CRLF. Received commands result in a
response code being returned per Table 1. Codes
beginning with a ‘?’ indicate illegal or unrecog-
nized commands.
3.5 The command ‘Qr’ returns the values in the
volatile RAM of the instrument. The values returned
reflect the present output and state of the 2965AR
synthesizer and are as follows:
F 12.345678901234
45 06 03 1B 05 00 00 02
3.6 The first line shows the output frequency in MHz
to 1µHz resolution. All twelve digits are always sent.
The next line has hexadecimal values showing the
present state of internal registers. These values will
only be the same as those from the ‘Qe’ command if
the values have been unchanged or a ‘S’ command
has been executed. They are reserved for factory use.
3.7 The command ‘Qe’ returns the stored values in
the non-volatile EEPROM of the instrument. The
values returned reflect the last saved state of the
2965AR synthesizer and are as follows:
F 12.345678901234
45 06 03 1B 05 00 00 02 00 EF FF B7 01
3.8 The first line shows the output frequency in MHz
to 1µHz resolution. The next line has hexadecimal val-
RS232 Response Codes
OK Good command received (not sent for
Reset, C, Qr and Qe)
?0 Unrecognized Command
?1 Bad Frequency
?3 Input line too long
