Syscom Video RX-702DH User manual

617 Byucksan Digital Valley Ⅱ 481-10 Kasan-Dong Kumchon-Gu Seoul Korea
Tel : [phone] Fax : [phone]
www.syscomk.co.kr E-mail : [email protected]
□ Half Size Receiver : □ RX-701DH/901DH
: □ RX-702DH/902DH
□ Multi Type Receiver : □ RX-702DM/902DM
: □ RX-703DM/903DM
: □ RX-704DM/904DM
□ One Channel Receiver : □ RX-700D/900D
□ 10Channel tunable system : □ RX-700DE/900DE
□ 10Channel 2 Receiver : □ RX-702DE/902DE
□ Hand Held Transmitter : □ TX-758M/958M/968M
□ Belt Pack Transmitter : □ TX-755PM/955PM/965PM
:□ KRT-750B

1. Brief Description································································································· 1
2. System Features ································································································· 2
3. Important Notes
4. Composition of W/L system
1) Ha l f S ize Rece i v er : R X - 7 01D H / 902 D H ·································· 3
2) Mu l t i Ty p e R e cei v e r : R X -70 2 D M /9 0 4 D M ·································· 5
3) O ne C h a n nel R e cei v e r : R X -700 D / 900 D ········································ 7
4) 10Channel s t unabl e Receive r : RX-7 0 0DE/ 9 0 0DE ··································· 9
5) 1 0Cha n nel 2 R ecei v e r : RX - 7 02DE / 902D E ··································· 1 1
6) H a nd H e ld Tr a n smit t er : TX - 758M / 9 58M ········································ 1 3
7) B elt P a ck Tr a n smit t er : TX- 7 5 5 PM9 5 5 PM ···································· 1 4
8) B elt P a ck Tr a n smit t er : KRT - 7 50B ················································· 1 5
5. The process of transmitter············································································· 1 6
6. Frequency Chart ································································································· 1 7
7. Troubleshooting
·································································································· 19
8. Specification ········································································································ 2 0
Since 1985 SYSCOM has manufactured wide range of wireless
microphone system which are from 19" rack-mountable system to
professional W/L products for videograhpers.
This system is 19" rack-mountable product which are for the public
address and is designed for the professionals, making it possible to
satisfy them with clear and reliable sound quality.
Frequency range of this products are based on 700MHz and 900MHz
band width which are on customer's request in your country.
M E M O
-1-

1) Adopting the sound compander circuitry, it improves wide
dynamic range and high signal-to-noise rate.
2) The limiting circuitry also makes sure that there is no sound
distortion.
3) At the audio outputs of receiver Audio Transformer is
incorporated in order to remove line-crossing.
4) Thanks to the Double Conversion and Saw Filter, there is on
cross-noises by other electronic wave in spite of using
multi-channels in limited place simultaneously.
5) Power supply of transmitter is 3V( 2 of AA size 1.5V battery)
and Receivers are using the dedicated AC Adapter.
1) We recommend Alkaline battery for the transmitter. In fact, the
others have a tendency to deteriorate operating time and function.
2) Make sure battery is inserted properly (+/- battery terminals must
match transmitter terminals)
3) Pay carful attention to the location of system. It is not desirable to
set up the system near the live trolley wire, power transmitter line,
power cable and so on because EMI noise can lead to RF noise.
4) The battery which are already being used for transmitter must be
carried out of the battery terminal if it is supposed to be out of
use long time.
5) Elaborately manufactured and precisely set up therefore you don't
need to adjust and take to pieces of your own accord.
Warranty Card
Warranty Conditions
SYSCOM warrants SYSCOM products against evident defects in material
and workmanship for a period of one year from the date of original
purchase for use.
This warranty does not cover damage resulting from misuse or abuse, or
lack of reasonable care, or inadequate repairs performed by unauthorized
service centers.
Performance of repairs or replacements under this warranty is subject to
submission of this warranty Card, completed and signed by the dealer on
the day of purchase and the sales slip. Shipment of the defective item for
repair under this warranty will be at the customer's own risk and expense.
This warranty is valid for the original purchaser only. This warranty is void
unless service or repairs are performed by an authorized service center. In
the event of making a claim under a warranty, please return the complete
product(incl. accessories), in the original packing if possible, together with
your receipt to your dealer, or send it to your local SYSCOM's distributor.
Carriage and return carriage charges are the customer's responsibility and
are not covered by this warranty.
700㎒ / 900㎒ WIRELESS MIC SYSTEM
Model RECEIVER : Serial No.
TRANSMITTER : Serial No.
Date of
Purchase
-2-

1) Half Size Receiver
Model : 700㎒ Band (RX-701DH/RX-702DH)
900㎒ Band (RX-901DH/RX-902DH)
A. Front Panel
① AF Level Meter
If the signal of transmitter is flowed in, this LED begins to light up.
It is adjustable with the AF Gain switch. For example, with regards to
the speech it is suitable to be "0"
② RF level A : It indicates the sensitivity of A channel RF
③ RF level B : It indicates the sensitivity of B channel RF
The better the RF signal is, the more segments of this LED extend.
④ True Diversity A,B
True Diversity means there are two RF tuners incorporated and it has
automatical function to choose a tuner in better receiving condition.
⑤ AF Gain
It is a volume to adjust the Audio output level of Receiver.
⑥ Channel selector
Note : When you choose the suitable channel, you must change the
channel of transmitter, making it same as Receiver.
⑦ Processing LED
It shows that operating is ready to go when the segment of LED lights up.
⑧ Channel Indicator
It shows the current channel
■ Transmitter
1) RF Output : 10㎽ ~ 50㎽ (On your request)
2) Modulation : PLL Synthesizer
3) Antenna type : Whip Antenna
4) Operatiing Distance : Max 100m ~ 200m
5) Operating Time : 6 hours
6) Power supply : DC 3V (AA" 1.5 × 2)
7) Weight : TX-755PM -110g, KRT-750 - 100g
: TX-758M - 220g(10CH), 250g (16CH)
■ Receiver
1) Frequency Range : 500㎒ ~ 900㎒
2) Frequency Stability : ± 15 PPM (RX+TX)
3) Frequency Sensitivity : 5㎶
4) Audio Frequency Response : 60㎐ ~ 15㎑ (±3㏈)
(DEM. 2K)
5) Signal to Noise Ratio : More than 90㏈ (RX+TX)
6) Maxium FM Deviation : 56K ~ 60K
7) Harmonic Distortion : Less than 0.6% (RX+TX)
8) AF Output : -40㏈m ~ -20㏈m (ADJ.)
9) Squelch : 0 ~ 30㎶ (ADJ. inside)
10) Pre-scaled channel : 16Channel (RX+TX)
11) Antenna type : Whip Antenna
12) Power supply : 220V/60㎐ Adapter
13) Weight : RX-700D - 3㎏ / RX-702DM - 3.8㎏
: RX-703DM - 4.4㎏ / RX-704DM - 4.7㎏
: RX-701DH - 2.6㎏ / RX-702DH - 2.9㎏
: RX-700DE - 2.3㎏ / RX-702DE - 2.5㎏
14) Dimension (W×H×D) : RX-700D - 483×44.5×256
: RX-702DM/703DM/704DM - 483×44.5×351
: RX-701DH/702DH - 237×44.5×335
: RX-700DE/702DE - 483×44.5×214
①
③
②
④
⑤
⑥
⑧⑦
-3- -20-

Most problems have been caused by battery. Therefore, you
should check the battery regarding the term of validity and what kind
of battery is before operating.
1) Make sure the date of battery
2) Preferred battery is alkaline battery than others
3) Pay careful attention to +/- battery terminal
4) At the transmitter locate the antenna and MIC unit respectively.
B. Real Panel
① A. Antenna : This terminal is for A antenna
② B. Antenna : This terminal is for B antenna
※ Note : It is a must to use standardized goods.
③ AC power Input
This Jack should be connected with AC adapter.
④ Fuse
It is desirable to use a standardized goods.
⑤ Unbalanced Output(PL 55 Jack)
⑥ Balanced Output(XLR-3P)
⑦ RX-2 Unbalanced Output (PL 55 Jack) : RX-702DH/RX-902DH
⑧ RX-2 Balanced Output (XLR-3P) : RX-702DH/RX-902DH
⑨ RX-1 Unbalanced Output(PL 55 Jack) : RX-702DH/RX-902DH
⑩ RX-1 Balanced Output (XLR-3P) : RX-702DH/RX-902DH
①
①
②
②
③
③
④
④
⑤⑥
⑦⑧⑨⑩
-19- -4-

2) Multi Type Receiver
Model : 700㎒ Band (RX-702DM/RX-703DM/RX-704DM)
900㎒ Band (RX-902DM/RX-903DM/RX-904DM)
A. Front Panel
① AF Level Meter
If the signal of transmitter is flowed in, this LED begins to light up.
It is adjustable with the AF Gain switch. For example, with regards to
the speech it is suitable to be "0"
② RF level A : It indicates the sensitivity of A channel RF
③ RF level B : It indicates the sensitivity of B channel RF
The better the RF signal is, the more segments of this LED extend.
④ True Diversity A,B
True Diversity means there are two RF tuners incorporated and it has
automatical function to choose a tuner in better receiving condition.
⑤ AF Gain
It is a volume to adjust the Audio output level of Receiver.
⑥ Channel selector
※ Note : When you choose the suitable channel, you must change
the channel of transmitter, making it same as Receiver.
⑦ Processing LED
It shows that operating is ready to go when the segment of LED
lights up.
⑧ Channel Indicator
It shows the current channel
2) 16Channel Frequency Chart
CH.NO FREQ'Y CH.NO FREQ'Y CH.NO FREQ'Y CH.NO FREQ'Y CH.NO FREQ'Y
032 740.375 47 744.125 62 747.875 09 928.250 79 950.250
133 740.625 48 744.375 63 748.125 10 928.250 80 950.250
234 740.875 49 744.625 64 748.375 11 928.250 81 950.250
335 741.125 50 744.875 65 748.625 12 928.250 82 950.250
436 741.375 51 745.125 66 748.875 13 928.375 83 950.375
537 741.625 52 745.375 67 749.125 14 928.500 84 950.500
638 741.875 53 745.625 68 749.375 15 928.625 85 950.625
739 742.125 54 745.875 69 749.625 16 928.750 86 950.750
840 742.375 55 746.125 70 749.875 17 928.875 87 950.875
941 742.625 56 746.375 71 750.125 18 929.000 88 951.000
A42 742.875 57 746.625 72 750.375 19 929.125 89 951.125
B43 743.125 58 746.875 73 750.625 20 929.250 90 951.250
C44 743.375 59 747.125 74 750.875 21 929.375 91 951.375
D45 743.625 60 747.375 75 751.125 22 929.500 92 951.500
E46 743.875 61 747.625 76 751.375 23 929.625 93 951.625
F47 744.125 62 747.875 77 751.625 24 929.750 94 951.750
MULTI CHANNEL FREQUENCY CHART
9G-1 9G-2
SW
7G-1 7G-2 7G-3
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-5- -18-

1) 10Channel Frequency Chart
CH.
NO FREQ'Y CH.
NO FREQ'Y CH.
NO FREQ'Y CH.
NO FREQ'Y CH.
NO FREQ'Y CH.
NO FREQ'Y CH.
NO FREQ'Y
0 32 740.375 47 744.125 62 747.875 42 742.875 41 742.625 09 928.250 79 950.250
1 33 740.625 48 744.375 63 748.125 43 743.125 56 746.375 14 928.500 84 950.500
2 34 740.875 49 744.625 64 748.375 44 743.375 57 746.625 16 928.750 86 950.750
3 35 741.125 50 744.875 65 748.625 45 743.625 71 750.125 18 929.000 88 951.000
4 36 741.375 51 745.125 66 748.875 46 743.875 72 750.375 20 929.250 90 951.250
5 37 741.625 52 745.375 67 749.125 57 746.625 73 750.625 22 929.500 92 951.500
6 38 741.875 53 745.625 68 749.375 58 746.875 74 750.875 24 929.750 94 951.750
7 39 742.125 54 745.875 69 749.625 59 747.125 75 751.125 13 928.375 83 950.375
8 40 742.375 55 746.125 70 749.875 60 747.375 76 751.375 19 929.125 89 951.125
9 41 742.625 56 746.375 71 750.125 61 747.625 77 751.625 21 929.375 91 951.375
MULTI CHANNEL FREQUENCY CHART
7G-4 7G -5 9G-1 9G-2
SW
7G-1 7G-2 7G-3
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B. Real Panel
① A. Antenna : This terminal is for A antenna
② B. Antenna : This terminal is for B antenna
※ Note : It is a must to use standardized goods.
③ AC power Input
This Jack should be connected with AC adapter.
④ Fuse
It is desirable to use a standardized goods.
⑤ RX-4 Unbalanced Output(PL 55 Jack) : RX-704DM/RX-904DM
⑥ RX-4 Balanced Output(XLR-3P) : RX-704DM/RX-904DM
⑦ RX-3 Unbalanced Output (PL 55 Jack)
⑧ RX-3 Balanced Output (XLR-3P)
⑨ RX-2 Unbalanced Output(PL 55 Jack)
⑩ RX-2 Balanced Output (XLR-3P)
⑪ RX-1 Unbalanced Output(PL 55 Jack)
⑫ RX-1 Balanced Output (XLR-3P)
①
①
②
②
③
③
④
④⑤⑥⑦⑧
①
②
⑨⑩
⑪⑫
-17- -6-

3)
One Channel Receiver
Model : 700㎒ / 900㎒ Band (RX-700D/900D)
A. Font Panel
① RF Signal level Meter
It indicates the sensitivity of RF signal
The better the RF signal is, the more green segments are
lighting up.
② Squelch Lamp
When the signal of transmitter is flowed in, this Lamp lights up
③ True Diversity Lamp
True Diversity means there are two RF tuners incorporated and it
has automatical function to choose a tuner in better receiving
condition.
④ Audio Level Meter
If the signal of transmitter is flowed in, this LED begins to light
up.
⑤ Channel Indicator
It shows the current channel
There is a channel switch on the rear panel
⑥ AF Output volume
⑦ Headphone Jack
It is very convenient to monitor sound before going into the
speakers.
⑧ Monitor Gain
It adjust the output level of headphone
⑨ Power switch
1) If Power of transmitter start to work, RF lever meter of receiver
simultaneously lights up. By the way, if the RF lever meter is
not going up to meddle, there are something bad happened
probably. And in case of illegible, it is caused by the antennas
of receiver or longer operating distance than 100m. Please refer
to the troubleshooting sheet.
2) If the MIC start to work well it is desirable to make the tour of
intended-area in order to confirm whether there are dead points
or not. Because the lowering of RF can lead to the
troubleshooting such as Fizzing. For your information, it is one
of solutions to relocate the receiver a little.
①②③④⑤⑥⑦⑧⑨
-16--7-

8) Belt Pack Transmitter (KRT-750B)
① MIC input connector : Connect the jack of MIC cable.
② Gain Control : To adjust the sensitivity of MIC volume.
③ Channel Selector
It is available to choose the channel within 16 channels.
④ Antenna connector : Connect the antenna.
※ Note : Only the standard antenna ensure the quality.
⑤ Power Lamp
This red lamp provides the information on the power.
⑥ Power switch : Slide the switch ON/OFF
⑦ Battery indicator
This 3-segments LED display indicates the remaining transmitter
battery capacity. Operating time is up to 6 hours. when two lamps of
3-segment are lighting up it means 210 minutes to go. One lamp
means 1 hours left and if the lamp is flat you should replace the
battery within the next 20 minute.
⑧ Battery terminal
Make sure battery is inserted properly
(+/- battery terminals must match transmitter terminals)
B. Real Panel
① Antenna input terminals
It should be connected with the dedicated antennas
※ Note : It is a must to use standardized goods.
② Power supply connector
This Jack should be connected with AC adapter.
③ Fuse
It is desirable to use a standardized goods.
④ This volume controls the sensitivity of A channel.
In case of something bad such as line-crossing or interference,
it will help to adjust sensitivity.
⑤ Channel selector
It is available to select a suitable channel among 16 pre-scaled
channels
⑥ This volume controls the sensitivity of B channel.
⑦ Unbalanced output Jack(PL 55 Jack)
⑧ Balanced output Jack(XLR-3P Jack)
①
②
③
④
⑤
⑥
⑦
⑧
①②③④⑤⑥⑦⑧①
-8--15-

4) 10Channels tunable system
Model : 700㎒ /900㎒ Band (RX-700DE/900DE)
A. Front Panel
① It indicates the antenna
② Squelch Lamp
If the transmitter starts to work, this lamp lights up.
③ This LED shows that the receiver is ready to work if the LED is
lighting up.
④ AF/RF LEVEL METER SELECTOR
④ AF/RF Level meter selector
means you can check the RF Level
means you can check the AF Level
⑤ AF/RF Signal Level meter
This meter indicates the degree of strength of RF signal.
The better RF signal is , the much more green level meter is
lighting up.
⑥ Channel indicator Board
⑦ AF Output volume
⑧ Power switch
7) Belt Pack Transmitter (TX-755PM/955PM)
(10CH,16CH)
① Mic input connector
This terminal should be connected with the Mic unit
② Gain Control
It can adjust the sensitivity of Mic unit, so that you can set the
gain control for a variety of venues.
③ Channel Selector
You are allowed to select one of the pre-scaled 16 channels
④ Antenna input connector
This terminal should be connected with the standardized antenna.
⑤ Low Bat. Indicator
It indicates the status of Batteries. If the LED Lamp is flat, it means
batteries should be replaced with new batteries within 30 minutes.
※ Note : Operating time is max 6 hours. And it is also
available to use rechargeable batteries in order to save
expenditure
⑥ Power switch
⑦ Battery terminal
Make sure battery is inserted properly
(+/- battery terminals must match transmitter terminals)
①②③④⑤⑥⑦⑧
-9- -14-
⑦
①
②
③
④
⑤
⑥