Clock-Free Baseband Interface Option - Cf; Clock Generator Output Option - Cg; Dual Power Option - Dp; Digital Switch Box Option - Dswbx - Quasonix TIMTER Installation And Operation Manual

TIMTER™ Multi-mode Dual
Telemetry Transmitter
1.3.15 Clock-free Baseband Interface Option – CF
Clock-free is an optional mode that transmits user data, but uses an internal bit sync to take the place of the normal
external clock. The standard TIMTER requires external clock and data inputs. With the CF option, no external clock
is required. The clock is generated directly from the data and a user-specified bit rate.
Because the internal bit sync's clock takes the place of the normal external clock in clock-free mode, the selected
clock source must be external for clock-free just like it is for normal clock/data. This mode is most often used to
retrofit older analog transmitters in TM systems where the crypto device does not deliver a clock to the transmitter.
The commanded clock-free rate can be saved using the SV command, and if so, it will be restored at power-on.
When the CF option is used, the bit rate range is 0.1 to 35 Mbps for all waveform modes. It is limited by the bit rate
achievable for the current mode. (Refer also to the HR and LR options for extended bit rates, and the ID option for
Internal Clock and Data.)
Do not confuse the CF option with CS/DS commands.
Internal clock (CS 1 Command) is used when the transmitter is to be a test source only. The unit transmits the
selected internal data pattern (DS 1 command) at the bit rate set by the user via the IC command. The internal clock
is not used to transmit actual payload data.
External clock (CS 0 Command) is the normal mode: the user supplies clock and data, or in clock-free mode, the
user provides only valid data. Refer to Table 12 for user commands.
1.3.16 Clock Generator Output Option – CG
The standard TIMTER includes internal clock and data generators, generally used for system test. The CG option
enables this internal clock out of the unit on the primary MDM-15 connector. The assignment of output pins
depends on the other features selected.
1.3.17 Dual Power Option – DP
The DP option provides two software-programmed, hardware-actuated settings, designated as "high power" and
"low power". There are 64 choices for "high power" and 64 choices for "low power." Valid range is 0 to 31.5 dB in
0.5 dB steps.
1.3.18 Digital Switch Box Option – DSWBX
The TIMTER™ provides a standard configuration interface that is easily accessible via a computer terminal. Some
nd
users prefer configuration via an external switch box. The 2 Generation Quasonix switch box provides six LED
digits used to display the mode and frequency. This includes a total of five digits of frequency step up or down, in
MHz, and one digit of mode selection, in terms of the ARTM "Tier" number. There is also a channel selector for
channel 1 or channel 2. Two channel operation is only valid when connected to a Dual Telemetry Transmitter.
Standard transmitters default to Channel 1. An 18" MDM-9 to MDM-9 cable harness is included with the switch
box. (For use with the P9 option)
1.3.19 Frequency Offset – FO
This option is used to set frequencies that are NOT aligned to the synthesizer step size for their units, typically 500
kHz, and it enables the FO user command.
1.3.20 High Bit Rate Option – HR
The standard TIMTER supports bit rates from 0.1 to 28 Mbps in SOQPSK-TG and MULTI-h CPM modes, 0.05 to
14 Mbps in PCM/FM (Tier 0) mode and in all legacy modes. The HR option increases the bit rate to a maximum of
46 Mbps (23 Mbps for PCM/FM). (The maximum bit rate with a Clock Free transmitter is 35 Mbps for SOQPSK-
TG and MULTI-h CPM modes; 23 Mbps for PCM/FM and all legacy modes.) Refer to the CF option for
information about the Clock Free option. Refer to Table 11 for bit rate comparisons by mode.
10 Quasonix, Inc.