SRS SIM925 Octal Four-Wire 多路调制器 (8 CH)

Input channels: 8 (plus 1 bypass channel)

Wires per channel: 4

Series resistance: 2.0 Ω (max.)

Isolation resistance: >10 GΩ (typ.)

Input capacitance: 

<60 pF on selected channel, between any 2 leads or ground.

<25 pF on selected to unselected channel, any 2 leads.

<25 pF on unselected channels.

Max. switching capacity: 10 mA at 10 VDC

Thermal EMF: <10 µV (typ.)

Switching order:

Break-before-make (default)

Make-before-break (remote interface only)

Switching speed: 50 ms max. (break-before-make)

Active buffer:

   Bandwidth: 1 MHz (typ.)

   Input noise: 30 nV/√Hz at 10 Hz, 16 nV/√Hz at 1 kHz

   Bias current: 5 pA (typ.)

   Input overload: ±1.0 V

Operating temperature: 0 °C to 40 °C (non-condensing)

Interface: Serial via SIM interface

Connectors: Serial via SIM interface:

   Input channels: DB37 (female, front panel)

   Common: DB9 (male, rear panel)

   Bypass: DB9 (female, rear panel)

   SIM: DB15 (male) SIM interface

Power: Power supplied by the SIM900 Mainframe, or optionally by a user-supplied DC power supply (±15 V and +5 V).

Dimensions: 1.5" × 3.6" × 7.0" (WHL)

Weight: 1.5 lbs.




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