Receiver Installation

3000 Series Installation and Operation

is detected, reducing the possibility of interference. As a result, 3000 Series transmitters and receivers must be used together and should not be used with components from other Audio-Technica wireless systems, or with those of other manufacturers. Exception: 3000 Series components are compatible with Audio-Technica 1800 Series wireless system components.

Please note that in multiple-system applications there must be a transmitter-receiver combination set to a separate frequency for each input desired (only one transmitter for each receiver). Because the wireless frequencies are within UHF TV frequency bands, only certain operating frequencies may be useable in a particular geographic area.

Location

For best operation the receiver should be at least 3 ft. (1 m) above the ground and at least 3 ft. away from a wall or metal surface to minimize reflections. The transmitter should be at least 3 ft. from the receiver, as shown in Figure A. Keep antennas away from noise sources such as digital equipment, motors, automobiles and neon lights, as well as away from large metal objects.

Fig. A

Output Connections

There are two audio outputs on the back panel: balanced and unbalanced. Use shielded audio cable for the connection between the receiver and the mixer. If the input of the mixer is a 1/4" jack, connect a cable from the 1/4" unbalanced audio output on the back of the receiver housing to the mixer. If the input of the mixer is an XLR-type input, connect a cable from the balanced XLR-type audio output on the back panel to the mixer. The two isolated audio outputs permit simultaneous feeds to both unbalanced and balanced inputs. For example, both a guitar amp and a mixer can be driven by the receiver.

Antennas

Attach the included pair of UHF antennas to the antenna input jacks. The antennas are normally positioned in the shape of a “V” (both 45° from vertical) for best reception.

Antennas can be remotely located from the receiver. However, due to signal loss in cables at UHF frequencies, use the lowest-loss RF cables practical for any cable runs over 8 m/25 feet. RG8-type is a good choice. Use only copper-shielded cable, not CATV-type foil-shielded wire. Audio-Technica offers quality RF cables in four lengths, as well as remote antennas.

Either passive or active antennas may be used. Both input jacks offer switchable +12 V DC output on their center pins to operate Audio-Technica powered antennas or other in-line RF devices if desired. Up to 60 mA can be drawn from each antenna input jack.

Power Connections

Connect the included AC adapter to the DC power input on the back of the receiver. Loop the small cord from the DC plug over the cord hook above the jack, to keep the plug from being detached by an accidental tug on the cord. Then plug the AC adapter into an AC power outlet.

Operation of the receiver is controlled by the front-panel Power switch.

Receiver Controls and Functions
Front Panel Controls and Functions
Fig. B		1	2	3	4	5	6
		1	2	3	4	5	6
					-TUNER-
	ON		ALERT		A		MODE/SET
	ON	POWER	ALERT				MODE/SET
		POWER
	OFF				B
			UHF SYNTHESIZED DIVERSITY RECEIVER ATW-R3100b

1.POWER SWITCH: Press Power switch in and the receiver readouts will light.

2.ALERT INDICATOR: The Alert Indicator lights:

(a)When the receiver is in the Function Edit mode,

(b)When no RF signal is received from transmitter,

(c)When only one or two RF signal-strength bars are on,

(d)When the transmitter is in the Mute mode,

(e)When audio modulation level from the transmitter is close to the clipping point (AF +3/+6 bars),

(f)When only one bar of the Battery “fuel gauge” is on (transmitter battery is weak).

3.LCD WINDOW: Backlit screen indicates control settings and operational readings. See Figure D for examples.

4.TUNER OPERATION INDICATOR: Indicates which Tuner (A or B) has the better reception and is in operation. The “B” indicator also lights

to serve as confirmation of Mode/Set button entries.

5.UP/DOWN BUTTONS: Press Up or Down arrow buttons, in conjunction with the Mode/Set button, to step through menus, select operating frequency and edit receiver function choices.

6.MODE/SET BUTTON: Use in conjunction with the Up/Down arrow buttons to step through menus, choose operating frequency, initiate automatic scanning and select receiver function options.

		-TUNER-
ON	ALERT	A	MODE/SET
	POWER
OFF		B

UHF SYNTHESIZED DIVERSITY RECEIVER ATW-R3100b

7.MOUNTING ADAPTERS: For mounting the receiver in any standard 19" rack. Attach adapters to the receiver with the screws supplied and remove the four receiver feet. (Use optional AT8630 joining- plate kit to mount two ATW-R3100b receivers side-by-side.)

Rear Panel Controls and Functions

Fig. C 8	9	10	12		15
		AF
		LEVEL
ANT. B	ANT. A
		GROUND	AF OUT	AF OUT	12~18V
		GROUND LIFT	BALANCED	UNBALANCED	DC500 mA
		11		13	14

8.ANTENNA INPUT JACK: BNC-type antenna connector for Tuner “B.” Attach the antenna directly, or extend it with a low-loss antenna cable.

9.ANTENNA INPUT JACK: Input for Tuner “A.” Attach the antenna directly, or extend it with a low-loss antenna cable.

10.AF LEVEL CONTROL: Adjusts audio output level of both AF Output jacks; maximum output is fully clockwise.

11.GROUND LIFT SWITCH: Disconnects the ground pin of the balanced output jack (12) from ground. Normally, the switch should

3000 Series Installation and Operation