Low Bit Rate Option - Lr; Modulation Scaling Option - Ms; Hardware Preset Option - Ps (Ps2, Ps4, Ps8, Or Ps16); Recall Holdoff Option - Rh - Quasonix TIMTER Installation And Operation Manual

TIMTER™ Multi-mode Dual
Telemetry Transmitter
1.3.25 Low Bit Rate Option – LR
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 LR option decreases the bit rate to a minimum
of 50 kbps (25 kbps for PCM/FM). (The minimum bit rate with a Clock Free transmitter is 50 kbps for all modes.)
Refer to the CF option for information about the Clock Free option. Refer to Table 11 for bit rate comparisons by
mode.
1.3.26 Modulation Scaling Option – MS
This option enables the MS and MJ commands which allow a user to set the modulation scaling factor and scale the
modulation index of the transmitted signal. For additional information, refer to Table 12, or contact Quasonix.
1.3.27 Hardware Preset Option – PS (PS2, PS4, PS8, or PS16)
The TIMTER™ supports one or more hardware presets. A single preset defines the complete state of the transmitter,
including carrier frequency, modulation mode, data polarity, randomizer state, etc. Without the PS option, the
TIMTER™ supports only one hardware preset, which it reverts to at power-up. The PS in the option string specifies
that the unit supports multiple hardware presets (2, 4, 8, or 16). Presets are engaged by grounding various
combinations of pins on the terminal/parallel control selection. The number of presets available and which pins
engage the presets depend on the other features specified. Due to the limited number of pins available, the PS option
may require the elimination of the RF On/Off pin. Due to firmware part number parsing requirements, the hardware
preset option code must be at the very end of the part number to be valid. On units which use the standard MDM-15
connector, the ZY command displays the connector pinout showing preset pin locations. For additional information,
refer to Appendix A – Preset Option.
1.3.28 Recall Holdoff Option – RH
If this option is enabled, AND the recall holdoff pin is held low on powerup, THEN the software will do an 'RF 0'
to prevent the RF output from coming on until the user explicitly enters 'RF 1.' If the pin is high, then this option
has no effect.
1.3.29 Space-Time Coding — STC
Space-Time Coding is a waveform coding technique that uses transmit diversity to avoid destructive interference in
two-antenna systems with a similar bandwidth and power efficiency of SOQPSK. It has been adopted by the Range
Commander's Council, IRIG 106-17, Appendix 2-E.
1.3.30 Variable FIFO Depth Option – VF
This option enables the VF command which allows the user to set the FIFO depth on the transmitter for controlling
latency time between bits in and bits out. The range is 0 to 255 with 128 being the default. If no value is entered, the
current value displays.
1.3.31 Variable Power Option – VP
The standard TIMTER™ operates at its full rated RF output power. The software-based VP option provides 64
discrete power level settings. Valid range is 0 to 31.5 dB in 0.5 dB steps.
12 Quasonix, Inc.