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ACCURATE ELECTRONICS INC

WWW.ACCURATE.ORG

PO BOX 1654 97075-1654 8687 SW HALL BLVD 97008

6.06 At the transmit side, signals from the RX Ports 2, 3, 4, 5, and 6 enter

operational amplifier U-3 and are transformer-coupled to the TX Port 1 tip

and ring leads via transformer T2. The front-panel-mounted TX LEVEL

control provides a range of -6dB to +12 dB to compensate for line losses. A

-16 dB XMT PAD can be jumpered in the circuit for carrier applications.

6.07 The circuit operation for RCV Ports 2, 3, 4, 5 and 6 is identical to RX

Port 1. In all cases, the signals present on a given RCV LINE are coupled to

all XMT LINE ports, except the XMT LINE port associated with the RCV

LINE port that is originating the signals.

Calibration Circuits

6.08 The outputs of the six RX Port operational amplifiers appear at the input

of the RX TEST AMP. This amplifier provides an impedance match for an

AC voltmeter, which is plugged into the RCV CAL Bantam jack during the

receive alignment.

6.09 The output of the TX TEST AMP is coupled to the inputs of the six TX

LINE operational amplifiers. The TX TEST AMP, in conjunction with the

TX CAL Bantam jack, provides the interface for an oscillator, which is used

for the transmit level alignment on each transmit line.

5.10 An internally regulated power supply allows operation on external -22

to -56VDC input, and ground.

7. MECHANICAL OUTLINE

7.01 See FIGURE 2.

8. SPECIFICATIONS

8.01 Electrical

Power Requirements:

Maximum Input current (at -48 V Battery):

Reverse Battery Protection

Transmission:

Insertion Loss:

maximum output level (overload point) +10dBm

Frequency Response:

Harmonic Distortion:

Port Impedance:

Idle Noise:

Envelope Delay Distortion:

Longitudinal Balance:

Crosstalk (receive path to transmit path):

8.02 Environmental

Operating Temperature:

Humidity:

Altitude:

8.03 Physical

Calibration /Test:

Potentiometer Adjust:

Dimensions:

Weight:

Mounting:

Silkscreen (front panel):

Silkscreen (PCB):

This document contains proprietary information and is supplied for identification, maintenance, engineering evaluation or inspection purposes only and shall not be duplicated or disclosed without written

permission of: ACCURATE ELECTRONICS INC By accepting this document the recipient agrees to make every effort to prevent unauthorized use of this information.

- 48VDC (-22 to -56VDC)

Ground

factory adjusted to 0 dB dB

Can be adjusted from -10 dB to +23 dB

jumper selectable

+/- 5 dB, 300 Hz to 3.2 kHz

(referenced to 1 kHz)

< 5 % at + 10 dBm

all ports 600 ohms, +/- 10%, balanced

< 18 dBrn C at +22 dB bridge gain

< 100 microseconds, 300 Hz to 4 kHz

> 60 dB, 200 Hz to 3.5 kHz

> 60 dB, 300 Hz to 1 kHz

> 50 dB, to 3.3 kHz

0 - 49° C

up to 95% R.H., no condensation

up to 15,000 ft.(4,572 m)

Bantam jacks

slotted screw

5.600 "H x 1.500 "W x 6.000 "D

14.224cmH x 3.810cmW x 15.240cmD

15 oz. / 0.425 kg

One module mounting position

in a type 10 or 400 Relay Rack Shelf

white over black anodize

white over green

Practice Section 10401200 Rev A

BEAVERTON OR USA 503.641.0118

9. TESTING AND TROUBLESHOOTING

9.01 The Testing Guide Checklist (see Figure 5) may be used to assist in the

installation, testing or troubleshooting of the product. The checklist is

intended as an aid in the localization of trouble to a specific product. If a

product is suspected of being defective, a new one should be substituted and

the test conducted again. If the substitute product operates correctly, the

original product should be considered defective and returned to Accurate for

repair or replacement as directed below. We strongly recommend that no

internal (component-level) testing or repairs be attempted on the product.

Unauthorized testing or repairs may void the product's warranty. Also, if the

product is part of a registered system, unauthorized repairs will result in

noncompliance with Part 68 of the FCC Rules and Regulations.

TECHNICAL ASSISTANCE

9.02 Contact Accurate Electronics, Inc. 503.641.0118, FAX: 503.646.3903;

Mail: PO Box 1654, Beaverton OR 97075-1654.

RETURN PROCEDURE (FOR REPAIR)

9.03 To return equipment for repair, first contact Accurate Electronics, Inc.

Enclose an explanation of the malfunction, your company's name and

address, the name of a person to contact for further information, and the

purchase order number for the transaction. Accurate Electronics will inspect,

repair, and retest the equipment so that it meets its original performance

specifications and then ship the equipment back to you. If the equipment is

in warranty, no invoice will be issued.

10. MAINTENANCE

10.01 No preventive maintenance is required. General care is recommended.

11. WARRANTY

60 mA

11.01 All Accurate Electronics Inc. products carry a full FIVE (5) YEAR

warranty on materials and workmanship. See WARRANTY in front of

catalog.

Note: Warranty service does not include removal of permanent customer markings on

the front panels of Accurate Electronics' products, although an attempt will be made to

do so. If a product must be marked defective, we recommend that it be done on a piece

of tape or on a removable stick-on label.

11.02 If a situation arises that is not covered in the checklist, contact

Accurate Customer Service as follows (telephone number are given below):

Contact Accurate Electronic Customer Service

11.03 If a product is diagnosed a defective, follow the replacement procedure

in paragraph 11.04 when a critical service outage exists (e.g., when a system

of a critical circuit is down and no spares are available). If the situation is not

critical, follow the repair and return procedure in paragraph 11.05.

Replacement

11.04 To obtain a replacement product, notify Accurate Electronics. Be sure

to provide all relevant information, including the 10401200 part number that

indicates the issue of the product in question. Upon notification, we shall

ship a replacement product to you. If the product in question is in warranty,

the replacement will be shipped at no charge. Pack the defective product in

the replacement product's carton, sign the packing slip included with the

replacement, and enclose it with the defective product (this is your return

authorization). Affix the preaddressed label provided with the replacement

product to the carton being returned, and ship the product prepaid to Accurate

Electronics.

Repair and Return

11.05

Return the defective product, shipment prepaid, to Accurate

Electronics Inc. :

ACCURATE ELECTRONICS INC.

ATTN: REPAIR AND RETURN

8687 SW HALL BLVD. #100

BEAVERTON, OREGON 97008 USA

January 2014

FAX 503.646.3903