FCC ID: CASTEL0064 Base Station Paging Transmitter

Tait Radio Systems Division T800 Paging Systems T800 Paging Systems A beginners guide to Taits paging offerings

Tait Electronics Ltd August 2002 1 Types of paging modulators/Transmitters Tait currently manufactures the following paging products:

T800-30-0000 T800-30-0002 T800-32-0000 T800-32-0002 T837-20-1020 frequency Differential Frequency Shift Keying, paging board suitable for use with 512 or 1200 baud Pocsag or speech As above but with external reference. Low Speed Paging Modulator, suitable for use with 512, 1200 or 2400 baud Pocsag or 1600 baud FLEX. As above but with external reference. Low Speed Paging Exciter, purpose built VHF exciter for use with 512, 1200 or 2400 baud Pocsag or 1600 baud FLEX. This is essentially a VHF exciter with the T800-32-

0000 paging modulator built into it. It does not have voice capability. frequency T837-20-1021 As above but with external reference. frequency In addition to the above, you can order directly from the factory a T8xx-xx-1010 or T8xx-xx-1012 exciter or transmitter. These come with the T800-32-000x kit already fitted, and all required modifications done. These are suitable for UHF or 800/900 MHz paging requirements where we have not developed the Paging only exciter. T800 Paging Systems Page 2 of 2

Tait Electronics Ltd August 2002 2 High Stability Oscillator For wide area paging solutions, you will require some form of external frequency reference. The T801-20-0000 is a 10MHz OCXO reference with .001ppm stability and manually adjustable offsets up to 5ppm suitable for use with VHF wide area paging networks. It uses a single slot in a standard 5U T800 rack frame. The T800-28-0000 is a rack frame specifically designed for paging transmitters and includes slots for the T801-20-0000 reference, a Paging exciter and Power Amplifier, a T8x5 link receiver and a Power Supply. T800 Paging Systems Page 3 of 3

Tait Electronics Ltd August 2002 3 Modem / Delay board 2. The T800-37-0000 is used for two reasons:

1. To add a digital delay to the paging signal. This is used to compensate for the propagation delay for outlying paging transmitters on a wide area paging network. To decode the modem tones used on an analogue link from the paging encoder to the remote paging transmitter. The delay is adjustable from 0 5 msec in 3.35 sec (1 km) steps. The asynchronous modem is compatible with V.23 or Bell 202 modem standards and either 512 or 1200 bps rates. T800-35-0000 The T800-37-0000 fits inside of a T837-20-102x paging exciter. Installation is as simple as connecting the supplied ribbon cable to the paging exciter and selecting the required delay and data polarity using solder links. The T800-37-0000 is not fitted into the link transmitter; a separate modem is needed to convert the paging encoder data to V.23 or Bell 202 tones. T800 Paging Systems Page 4 of 4

Tait Electronics Ltd August 2002 4 Typical Wide Area Paging options Tait only manufactures equipment used between the paging encoder and the paging receiver. We do not manufacture encoders or receivers, as this is an already developed market with many manufactures providing cheep and reliable products. At the encoder end, you would need something like a Zetron Model 15 Encoder, which has a RS232 output. For wide area paging you need to connect this to a V.23 or Bell 202 modem before connecting it to your UHF link transmitter. We can supply a Slimline T800 for this purpose. Data entry Paging Terminal Paging encoder Modem Link TX Link RX Modem Digital Delay PA Paging Exciter HSO At the remote end, a T855 receiver is used to receive the signal from the central transmitter. This is then decoded by the T800-

37-0000 modem board, which also adds the required amount of delay to the signal. The T801-20-0000 is used to generate the reference frequency, with the required offset. The T837-20-

1021 then takes all of this to make the paging signal, which is fed to the PA and antenna equipment. And with any luck the subscriber has their pager turned on and receives the message. T800 Paging Systems Page 5 of 5

M830P-00 1 General General A1.1 1.1 Additional Technical Information If you have any questions about this manual or the equipment it describes, please con-

tact your nearest Tait Dealer or Customer Service Organisation. If necessary, you can get additional technical help from Customer Support, Tait Electronics Ltd, Christchurch, New Zealand (full contact details are on page 2). When requesting information, please quote either the manual product code (e.g. M830P-00-1TA), or the equipment product code and serial number which are printed on a label on the back of the product (as shown in Figure 1.1). this area used for regional Type Approval information T838-10-0000 Rev 1 900000 Tait Electronics Limited Made in New Zealand product code serial number T835-10-0000 Rev 1 900000 Tait Electronics Limited Made in New Zealand Figure 1.1 Typical Product Code & Serial Number Labels If you require information about a particular PCB, please quote the full PCB internal part number (IPN) which is screen printed onto the top side of the board (refer to the appropriate PCB Information section in this manual for more details). 1.2 Caution: CMOS Devices This equipment contains CMOS Devices which are susceptible to damage from static charges. Care when handling these devices is essential. For correct handling proce-

dures refer to the manufacturers' data books, e.g. Philips data books covering CMOS devices, or Motorola CMOS data books, Section 5 'Handling', etc. An anti-static bench kit (refer to Figure 1.2) is available from Tait Electronics Ltd under the following product codes:

KS0001 - 1 conductive rubber bench mat

- 1 earth lead to connect the mat to ground

KS0004 - 1 wrist strap. Copyright TEL 01/07/03 A1.2 General M830P-00 conductive wrist strap conductive rubber bench mat to building earth

(not mains earth) Figure 1.2 Typical Anti-static Bench Set-up 1.3 Caution: Aerial Load The equipment has been designed to operate safely under a wide range of aerial loading conditions. However, we strongly recommend that the transmitter should always be operated with a suitable load to prevent damage to the transmitter output power stage. 1.4 Caution: Beryllium Oxide & Power Transistors The RF power transistors in current use all contain some beryllium oxide. This sub-

stance, while perfectly harmless in its normal solid form, can become a severe health hazard when it has been reduced to dust. For this reason the RF power transistors should not be broken open, mutilated, filed, machined, or physically damaged in any way that can produce dust particles. 1.5 USA Installations: RF Exposure Compliance, Control Guidelines and Operating Instructions All radio transmitter installations must comply with the FCC environmental rules (refer to CFR 47 Chapter 1, sub-part I). In addition, the FCC requires the following safety information to be provided by the radio manufacturer:

To control exposure to yourself and others and ensure compliance with the gen-

eral/uncontrolled and occupational/controlled environment exposure limits always adhere to the following procedures. 01/07/03 Copyright TEL M830P-00 General A1.3 Guidelines:

User awareness instructions must accompany this device when transferred to other users.

Do not use this device if the operational requirements described herein are not met. Instructions:

Transmit only when people near the antenna are at least the recommended minimum distance away, as shown in Table 1.1, from a properly installed, according to installation instructions, externally-mounted antenna. Note:

Table 1.1 lists the recommended minimum distance for bystanders in an uncontrolled environment from transmitting types of antennas at fre-

quencies in the range 138-174MHz and several different ranges of rated radio power. Rated Power of Transmitter Recommended Minimum Distance from Transmitting Antennaa 5 50 100 watts 13cm 133cm 265cm a.These distances are calculated based on a 6dBi gain collinear antenna as might be used in a typical installation. For other powers and antenna types, consult the sup-

plier. Table 1.1 Rated Power and Recommended Distance Copyright TEL 01/07/03 A1.4 General M830P-00 01/07/03 Copyright TEL