Lower cost compared to a PSM-2100 modem by approximately 20%.

New "Hybrid" version helps build lower cost robust Multi-Modem VSATs.

New "L-Band" version helps build lowest cost robust VSATs. This modem works with virtually all BUCs/LNBs providing both power and reference on the transmit/receive IFL cables.

Optional “Turbo Product Codes” FEC. This new FEC type is promising an approximate 2.5 to 3 dB improvement over existing convolutional codecs such as Viterbi. This can reduce power or bandwidth requirements for links significantly.

A new Reed-Solomon option allows programmable block coefficients for compliance with IESS 308/309, existing PSM-2100/512 modems as well as new special requirements.

A new IBS Multiplexer option allows programmable framing/data load ratios for compliance with IESS 308/309, existing PSM-2100/512 modems as well as custom special requirements.

Higher data rate range extending to 4.92 Mbps. This allows use of the Reed-Solomon and IBS overhead channels even at T1 and E1 rates and above. Data rate selection using a 40 bit resolution vs. the 18 bit resolution in the existing design. Lower data rates are also possible down to 2.4 kbps QPSK and 1.2 kbps BPSK

Faster signal acquisition, using a faster, more powerful DSP. Approximately 3 times as fast as the industry leading PSM-2100 using a new 100 MIPS DSP processor. The time to acquire a 9.6 kbps QPSK carrier in +/- 30 kHz is now 315 mS. No other modem can touch the PSM-4900 in acquisition speed!

Higher maximum transmit IF power output to +5 dBm at 75 Ohm and +3 dBm at 50 Ohm.

Transmit and receive IF selectable for 50 or 75 Ohm impedance under software control. A 140 MHz IF is available on special order.

Seven main standard data interface types are built-in on the main PCB assembly, selectable electronically via the front panel or remote control. A single low cost dB-37 connector accommodates all types. Interface types include RS-422, RS-449, EIA 530/A, V.35, V.36, RS-232 (synchronous). An option interface (such as a Ethernet or G.703) can co-exist in the unit and be electronically selected under program control.

Built-in logic and control for low cost 1:1 redundancy. Application requires only normal station transmit and receive IF combiner and splitter plus a “Y” data cable to connect the terrestrial data lines together. Sophisticated communications built into the interface allows one modem to completely configure the other on setup. Switch “trigger” parameters are fully programmable as is the switch hold time.

New fully digital receive baseband filtering. Data rates switching significantly faster than the PSM-2100. Used to create "bandwidth on demand" systems.

Multiple setup/configuration settings which may be saved and recalled (8 plus default).

Any (or multiple) of the saved configurations can be automatically recalled on loss of receive carrier for a specified period of time. This Automatic Configuration Recovery (ACR) aids programming in sophisticated application like DAMA, remote programming, etc.

Built in BER test set with 2047 and 2²³-1 industry standard patterns selectable. The transmit and receive BERT are independent and maintain complex data such as BER, sync losses, errors, EFS(%), errored seconds, etc.

Programmable 16 bit D/A monitor output available on the rear panel. This analog output can be programmed to present one of several data items that the processor has access to, including the transmit carrier level, receive Eb/No and AGC.

Software contained in Flash memory for field upgrade to add new or enhanced features.

New front panel with individual keys to select the unit, modulator, demodulator and interface functions give the effect of a “3-D” parameter matrix for easier use. New “quick” entry mode allows direct entry of parameters without editing.

Smaller, lighter and lower power unit. Although still in a 1 rack unit height 19 inch chassis, the depth is approximately 12 inches (vs. over 16 inches on the existing PSM-2100/512). Weight is reduced by 1.5 lbs.

T1, E1, G.703 interfaces will be on an optional interface assembly allowing electronic switching between these outputs and the 7 types on the main board.

New TCP/IP interface using a 10 Base T LAN connection. Extensive software available from third parties for full system data management.

Optional programmable receive group delay equalization for compliance with IESS “Open System” specifications.

Optional unit and multi-unit control using a “Palm Pilot” hand held PDA device (with special PDA software). The PDA connects to a modem via a front panel IrDA infrared link.