PART II: PR 81 RECEIVER II
1g | Antennas: Being a diversity receiver, the PR 81 uses two antennas in order |
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| to receive the transmitter signal at two different points in space. The diversity |
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| circuit will automatically activate the antenna that provides the better signal. |
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1h | Color code platelet: If you use the receiver within a multichannel system, | 1.2.2 Front Panel | |
| you can remove the black plastic platelet and replace it with a different color |
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| platelet from the optional Color Coding Kit. This allows you to identify the |
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| various channels clearly and easily. |
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1i | Battery compartment: Accepts the supplied 1.5 V dry batteries, recharge- |
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| able batteries of the same size (not supplied), or the optional PA 81 supply |
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| adapter. |
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1j | SQUELCH: The squelch will mute the receiver if the received signal is too |
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| weak so the related noise or the |
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| audible when the transmitter is switched OFF. Set the SQUELCH control to |
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| minimum before switching power to the receiver ON for the first time. (For |
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| details, refer to Part V, section 1.) |
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1k | CHANNEL: This rotary switch selects the desired receiving frequency. |
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1l | Battery compartment cover. |
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1m Screwdriver: A detachable screwdriver is provided on the inside of the bat- |
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| tery compartment cover (1l) for adjusting the SQUELCH and CHANNEL |
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| controls. |
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1n | Carrier frequency table: Sticker indicating the available carrier frequencies | 1.2.3 Rear Panel | |
| and the frequency set for which your receiver has been programmed. |
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1o | Approval marks. |
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1p | Belt clip for fixing the receiver on your belt. |
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| 1.3 Audio Output | |
The AUDIO OUT | |||
a |
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control (1e) lets you adjust the volume level of the headphones output. |
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The AUDIO OUT connector (1c) is wired as follows: |
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Pin 1: ground |
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Pin 2: line output (fixed level) |
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Pin 3: headphone output (adjustable) |
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In order to avoid overloading the headphone amplifier, do not connect head- | Important: | ||
phones with an impedance of less than 16 Ω to the headphone output. |
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2 Setting Up
Prior to inserting batteries into the receiver, set the transmitter and the receiver to | 2.1 Selecting the | |
the same carrier frequency. The carrier frequency tables on the transmitter (2h, 3k) | Receiving Frequency | |
and receiver (1I) indicate the channel numbers corresponding to the various car- |
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rier frequencies. |
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1. | If the belt clip (1p) is attached to the receiver, remove the belt clip (1p) first so |
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| you can open the battery compartment (1I): |
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| Use a screwdriver as a lever to lift both ends of the belt clip (1p) out of the |
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| fixing holes in the receiver side panels. |
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2. | To open the battery compartment (1I), press down on the arrow symbol on the |
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| battery compartment cover (1l) and push the battery compartment cover (1l) |
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| in the direction of the arrow away from the receiver. |
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3. | Remove the screwdriver (1m) from the battery compartment cover (1l). |
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4. | Use the screwdriver (1m) to set the CHANNEL selector (1k) to the desired |
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| channel. |
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5. | Set the transmitter to the same channel referring to section 2.1 in Part III: |
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| HT 81 Handheld Transmitter or Part IV: PT 81 Bodypack Transmitter. |
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