Model 1073A Distribution Amplifier

The Arbiter Systems^®, Inc. Model 1073A Distribution Amplifier is designed to buffer and distribute signals generated by sources such as the Models 1084A/B/C, 1088B, 1092A/B/C and the 1093A/B/C GPS Satellite-Controlled Clocks. The Model 1073A includes three separate channels, each with four high-drive-capability outputs, to buffer your choice of signals. Each channel has a limiting amplifier to stabilize the peak-to-peak signal level. Each input is galvanically isolated with a transformer or optical isolator to break ground loops and reject common-mode signals. Standard isolation is 2000 volt rms.

Each channel may be use independent signals or, for applications requiring more than four outputs, may use the same signal. Channel A may drive channels B and C or channel B may drive channel C. These selections are made with internal jumpers. For fiber-optic input signals, Option 01 provides an 820 nm, Type ST optical fiber input for channel A.

Each input and output may be individually ac- or dc-coupled. In dc-coupled mode, the Model 1073A can distribute 5 V CMOS/TTL logic-level signals, such as one pulse per second (1 PPS) and unmodulated IRIG-B timecode. In ac-coupled mode (intended for frequencies of 100 kHz or greater), the Model 1073A can receive and distribute timebase and reference frequency signals up to 10 MHz. Input and output configuration may be independently selected. For example, a channel may receive an ac-coupled 5 MHz input, and one output of that channel may be set for dc-coupled (logic-level) output while the other three are set for ac-coupled outputs. Settings are made with internal jumpers.

Because of the limiting amplifiers and frequency limit when ac coupled, the Model 1073A is not suitable for distribution of modulated IRIG-B signals.

Intended primarily for unattended operation, the Model 1073A has no display or keyboard. A front-panel LED indicates that power is applied and the unit is operating. Power options include 85 to 264 Vac/110 to 275 Vdc with an IEC-320 detachable cordset, 110 to 275 Vdc terminal strip inlet with surge withstand, or 10 to 60 Vdc terminal strip inlet with surge withstand.

Model 1073A Specifications

I/O Configuration:

Configuration:

Channels Three, each with four outputs

Mode

Independent Each channel independently driven

Common A/B B/C outputs driven by A or B input

Selection Internal push-on jumpers

Inputs:

DC coupled Opto-isolator (HCPL2601) in series with 562-ohm resistor

Level 5 mA at 5 volts, nominal

Polarity Center conductor positive

Frequency DC to 5 MHz

AC coupled RF transformer; 50 ohms

Level 0 to +15 dBm (0.6 to 3.6 Vpp)

Frequency 100 kHz - 10 MHz

Selection Internal push-on jumpers

Isolation 2000 Vrms, minimum, to common

Outputs:

Driver Each output, 74HC125 quad buffer

Coupling AC (0.1 µf capacitor) or dc (Selected by internal push-on jumpers)

Level 5 Vpp, open-circuit; 2.5 Vpp (+12 dBm), into 50 ohms

Impedance 50 ohms

Connectors:

Input Isolated 50-ohm BNC, 1 per channel

Output 50-ohm BNC, four per channel

Fiber Optic Type ST, for 62.5/125 µm multimode fiber, optional (1073opt01)

Interface:

Operator:: Status LED Power On (green)

Certifications and Approvals:

CE mark/label and certificate

Power Requirements:

Standard:: Voltage 85 to 264 Vac, 47 to 440 Hz, 20 VA maximum or 110 to 275 Vdc, 15 W maximum; Inlet IEC-320 with fuse and mating cordset. Specify option P01 - P10; Available cordset plug style and specifications are described in the Options/AccessoriesOptions/Accessories section.

General:

Physical:: Size 1 RU rack mount or tabletop; 260 mm deep FMS. Rack mounts included.
508 x 381 x 203 mm (20 x 15 x 8 in.), shipping; Weight: 2 kg (4.5 lbs), net
3.2 kg (7 lbs), shipping
Environmental:: Operating Temperature 0° to +50° C (-20° to +70 ° C typical); Nonoperating Temperature -40° to +75° C; Humidity Noncondensing; EMC Radiated susceptibility: passes walkie-talkie test; Conducted emissions: power supply complies with FCC 20780, Class A and VDE 0871/6.78 Class A; Surge withstand capability (SWC), power inlet: designed to meet ANSI/IEEE C37.90-1 and IEC 801-4

Options:

I/O:

Order Number:	Description
1073opt01:	Fiber-Optic Input (multimode)

General:

Order Number:	Description
1073opt04:	On/Off Switch

Power (select only one):

Order Number:	Description
1073opt07:	IEC-320 Power Inlet, 85 to 264 Vac, 110 to 275 Vdc
1073opt08:	Terminal Power Strip, Surge Withstand, 10 to 60 Vdc
1073opt10:	Terminal Power Strip, Surge Withstand, 85 to 264 VAc, 110 to 275 Vdc