TIMTER™ Multi-mode Digital Telemetry Transmitter
32
Quasonix, Inc.
4 Operating Instructions
4.1 Power-on Operation
Upon power up, the transmitter loads any stored parameters present in its nonvolatile memory. If parameters have
not been stored previously, the transmitter initializes default parameters and then stores them in the first preset slot,
0. There are a total of 16 available software-based presets (0 through 15) for saving multiple parameters at once for
future use.
PF / PM OPTION NOTE: Stored parameters are loaded based on the state
of the startup configuration (SC) setting. The SC setting allows the user to
choose the priority between the parameters stored in nonvolatile memory
and the frequency and/or mode settings designated by pins on the external
parallel control connector. For other variations, contact Quasonix.
4.1.1
Dual Power via Hardware Control
When the dual power option (DP) is specified, the transmitter uses the hardware pin to switch between the low
power setting and the high power setting.
When the pin is left floating or pulled high (logical 1), the transmitter enters the high power mode. When the pin is
grounded (logical 0), the transmitter enters the low power mode.
4.1.2
2nd Generation Switch Box Notes
If a Quasonix 2nd Generation Digital Switch Box is attached to the transmitter, and the digital switch box option is
present (check the part/model number of the transmitter for DSWBX), all changes made to mode, frequency, or
LDPC selections on the transmitter are also updated immediately on the Switch Box. This ensures the switch box
settings always match those of the transmitter.
4.2
TIMTER™ Serial Control Protocol
When in Serial Control (Terminal) mode, the TIMTER™ is controlled via a simple three-wire serial interface
(transmit, receive, and ground). The serial port configuration is as follows:
•
57600 baud rate (changeable depending on the configuration option)
•
8 bits
•
No parity
•
1 stop bit
•
No flow control
For setup and configuration via a standard Windows-based PC, you may use HyperTerminal. For a more flexible,
full-featured control interface, we recommend Terminal, available for download from the Quasonix website
(Documents tab > Accessories link) or directly at:
http://www.quasonix.com/sites/default/files/terminal_ver20080315.zip
If the terminal program is active when power is applied to the transmitter, the following welcome message displays,
as shown in Figure 23. At this point, you can verify that your serial connection is active in both directions by issuing
any standard command, such as “FR” to learn the frequency.
