View of the amplifier

View of the inside of the amplifier with visible circuitry of the forward and return paths including cut-outs

The included accessories

Universal distribution amplifier Terra DA-233 has been designed for amplifying and distributing TV signals in CATV networks with return channel, including HFC networks. Its output stage uses GaAs push-pull technology. Modular construction allows customization for specific network requirements. The changeable plug-in return path module shaping the frequency characteristics of the return channel can use passive or active components. Appropriate plugins can also shape the frequency response of the forward path and determine the interstage attenuation.

The amplifier is placed in an IP 64 housing (total dust ingress protection and immunity to water spray from any direction), with high screening efficiency. The unit is dedicated to work in the main sections of distribution networks, having the ability to pass up to 7 A current.

The DA-233 amplifier is powered from a remote 24...65 VAC source. The amplifier is equipped with one input and two outputs (PG-11). To ensure the stability of the main parameters, the amplifier uses plug-ins to set the gain and slope parameters.

The interstage attenuators allow temperature control of the attenuation level. Another plugin can be used for automatic gain control based on one carrier frequency (available on request).

Main features:

• push-pull output stage in GaAs technology,
• waterproof housing with high screening efficiency,
• equalizer at the input of the forward path,
• interstage equalizer between the first and second stage of the forward path,
• attenuator at the input of the forward path,
• attenuator between the first and second stage of the forward path,
• choice of active or passive return path by using the appropriate plugin,
• equalizer at the output of the return channel,
• attenuator at the output of the return channel,
• -20 dB input test point (bidirectional),
• -20 dB output test point (directional),
• over-current protection of the input and outputs,
• ability to inject supplying voltage to the distribution network.

Similar models available to order:

Please contact our sales department to order an appropriate model of amplifier.

JXP-x(x) plugins - interstage attenuators and equalizers

* When ordering a plug-in, please give the name and value of attenuation - for example, JXP-5 (5dB). It is possible to order plug-ins with attenuation values 0-20 dB (step 1 dB).

Plug-ins from pr 05-xx series (active return channel) cooperating with JXP plugs

Plug-ins from pr 04-xx series (active return channel) with potentiometers

For a passive return path, the plug-in pl 02-00 R81744 should be used. No additional module is required if the amplifier is to operate without a return path (except the pl 01-00 R81742 plug-in link).

Additionally, the return path has to be equipped with one of the pd 03-xx R81750, R81751, R81752 modules (depending on the required band).

Depending on the needs, the DA-133 amplifier can have one or two outputs. With one output, it is necessary to use the pl 02-00 R81744 plug-in, with two outputs one of the ps 01-xx splitters.

Name		DA-233
Code		R82430
Frequency range	forward path (1)	47/75/87 ... 862 MHz
	return path (1)	5-30/55/65 MHz
Gain	forward path	36 dB
	return path	depends on plug-in
Pass-band ripple		+/- 0.75 dB
Gain adjustment		0-18 dB
Slope adjustment		0-18 dB
Slope adjustment in return path		0-9 dB (step 1 dB)
Output level CTB, CSO (2)		112 dBuV
Input/output return loss		18 dB / 40MHz, -1.5 dB/octave
Noise figure		max. 6 dB
Test output level		-20 dB
Type of connectors (3)		PG-11
Power (4)		24...65 VAC 50 Hz
Power consumption		max. 17 W
Max AC pass current		7 A
Operating temperature		-20...+50 °C
Dimensions		229x159x87 mm
Weight		2.5 kg

(1) depending on the module (plug-in)
(2) with 6 dB interstage attenuator
(3) available custom models with F or mixed connectors
(4) available custom models with local power supplies (230 VAC)

Anyone who has a problem with selecting a suitable amplifier, plug-in etc. can refer to the Terra catalog of the equipment for broadband cable networks. Each of the products listed in the catalog can be imported on request.