Drake digital MM806 User Manual

MM806

NTSC Modulation Monitor

Instruction Manual

® is a registered trademark of the R.L. Drake Company

© Copyright 2002 R.L. Drake Company P/N:3852398B-3-200 Printed in the U.S.A.

2

Caution Statements

WARNING: TO PREVENT FIRE OR

ELECTRICAL SHOCK DO NOT

EXPOSE TO RAIN OR MOISTURE

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC

SHOCK,

DO NOT REMOVE COVER

NO USER-SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

WARNING:

CAUTION:

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT
TO RAIN OR MOISTURE.
DO NOT OPEN THE CABINET, REFER SERVICING TO QUALIFIED PERSONNEL ONLY.

TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION
CORD RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO
PREVENT BLADE EXPOSURE.

A product and cart combination should be moved
with care. Quick stops, excessive force and
uneven surfaces may cause the product and cart
combination to overturn.

The lightning flash with arrow head symbol, within
an equilateral triangle, is intended to alert the user
to the presence of uninsulated "dangerous voltage"
within the product's enclosure that may be of
sufficient magnitude to constitute a risk of electric
shock to persons.

The exclamation point within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying
the product.

ATTENTION:

POUR PREVENIR LES CHOCS ELECTRIQUES, NE PAS UTILISER CETTE FICHE POLARISEE
AVEC UN PROLONGATEUR, UNE PRISE DE COURANT OU UNE AUTRE SORTIE DE
COURANT, SAUF SI LES LAMES PEUVENT ETRE INSEREES A FOND SANS EN LAISSER
AUCUNE PARTIE A DECOUVERT.

Important Safety Instructions

3

1. Read Instructions—All the safety and operating instructions should be read
before the product is operated.

2. Retain Instructions—The safety and operating instructions should be
retained for future reference.

3. Heed Warnings—All warnings on the product and in the operating
instructions should be adhered to.

4. Follow Instructions—All operating and use instructions should be followed.

5. Cleaning—Unplug this product from the wall outlet before cleaning. Do not

use liquid cleaners or aerosol cleansers. Use a damp cloth for cleaning.

6. Attachments—Do not use attachments that are not recommended by the
product manufacturer as they may cause hazards.

7. Water and Moisture—Do not use this product near water—for example,
near a bathtub, wash bowl, kitchen sink or laundry tub; in a wet basement;
or near a swimming pool; and the like.

8. Accessories—Do not place this product on an unstable cart, stand, tripod,
bracket, or table. The product may fall, causing serious injury to a child or adult,
and serious damage to the product. Use only with a cart, stand, tripod, bracket,
or table recommended by the manufacturer, or sold with the product. Any
mounting of the product should follow the manufacturer's instructions, and
should use a mounting accessory recommended by the manufacturer.

9. A product and cart combination should be moved with care. Quick stops,
excessive force, and uneven surfaces may cause the product and cart
combination to overturn.

10. Ventilation—Slots and openings in the cabinet are provided for ventilation
and to ensure reliable operation of the product and to protect it from
overheating, and these openings must not be blocked or covered. The
openings should never be blocked by placing the product on a bed, sofa, rug,
or similar surface. This product should not be placed in a built-in installation
such as bookcase or rack unless proper ventilation is provided or the
manufacturer's instructions have been adhered to.

11. Power Sources—This product should be operated only from the type of
power source indicated on the marking label. If you are not sure of the type of
power supplied to your home, consult your product dealer or local power
company. For products intended to operate from battery power, or other
sources, refer to the operating instructions.

12. Grounding or Polarization—This product may be equipped with a
polarized alternating-current line plug (a plug having one blade wider than the
other). This plug will fit into the power outlet only one way. This is a safety
feature. If you are unable to insert the plug fully into the outlet, try reversing
the plug. If the plug should still fail to fit, contact your electrician to replace
your obsolete outlet. Do not defeat the safety purpose of the polarized plug.
Alternate Warnings—If this product is equipped with a three-wire grounding­type plug, a plug having a third (grounding) pin, the plug will only fit into a
grounding-type power outlet. This is a safety feature. If you are unable to insert
the plug into the outlet, contact your electrician to replace your obsolete outlet.
Do not defeat the safety purpose of the grounding-type plug.
12 a. Mise à la terre ou Polarisation—Cet appareil est équipé avec un cordon
d'alimentation à trois fils. Il est a brancher sur une prise ayant un connecteur a
la terre. Assurez-vous que la connection a la terre ne manque pas.

13. Power-Cord Protection—Power-supply cords should be routed so that
they are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit from the product.

14. Outdoor Antenna Grounding—If an outside antenna or cable system is
connected to the product, be sure the antenna or cable system is grounded so
as to provide some protection against voltage surges and built-up static
charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides
information with regard to proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an antenna discharge unit, size of
grounding conductors, location of antenna-discharge unit, connection to
grounding electrodes, and requirements for the grounding electrode.
See Figure A.

15. Lightning—For added protection for this product during a lightning storm,
or when it is left unattended and unused for long periods of time, unplug it from
the wall outlet and disconnect the antenna or cable system. This will prevent
damage to the product due to lightning and power-line surges.

16. Power Lines—An outside antenna system should not be located in the
vicinity of overhead power lines, other electric light or power circuits, where it
can fall into such power lines or circuits. When installing an outside antenna
system, extreme care should be taken to keep from touching such power lines
or circuits as contact with them may be fatal.

17. Overloading—Do not overload wall outlets, extension cords, or integral
convenience receptacles as this can result in a risk of fire or electric shock.

18. Object and Liquid Entry—Never push objects of any kind into this product
through openings as they may touch dangerous voltage points or short-out
parts that could result in a fire or electric shock. Never spill liquid of any kind
on the product.

19. Servicing—Do not attempt to service this product yourself as opening
or removing covers may expose you to dangerous voltage or other hazards.
Refer all servicing to qualified service personnel.

20. Damage Requiring Service—Unplug this product from the wall outlet and
refer servicing to qualified service personnel under the following conditions:

a. When the power-supply cord or plug is damaged,
b. If liquid has been spilled, or objects have fallen into the product,
c. If the product has been exposed to rain or water,
d. If the product does not operate normally by following the operating

instructions. Adjust only those controls that are covered by the operating
instructions as an improper adjustment of other controls may result in damage
and will often require extensive work by a qualified technician to restore the
product to its normal operation,

e. If the product has been dropped or damaged in any way, and
f. When the product exhibits a distinct change in performance—this indicates

a need for service.

21. Replacement Parts—When replacement parts are required, be sure the
service technician has used replacement parts specified by the manufacturer
or have the same characteristics as the original part. Unauthorized substitutes
may result in fire, electric shock or other hazards.

22. Safety Check—Upon completion of any service or repairs to this product,
ask the service technician to perform safety checks to determine that the
product is in proper operating condition.

23. Wall or Ceiling Mounting—The product should be mounted to a wall or
ceiling only as recommended by the manufacturer.

24. Heat—The product should be situated away from heat sources such as
radiators, heat registers, stoves, or other products (including amplifiers) that
produce heat.

NOTE TO CATV SYSTEM INSTALLERS:

THIS REMINDER IS PROVIDED TO CALL THE
CATV SYSTEM INSTALLER'S ATTENTION TO
ARTICLE 820 - 40 OF THE NEC THAT
PROVIDES GUIDELINES FOR PROPER
GROUNDING AND, IN PARTICULAR,
SPECIFIES THAT THE CABLE GROUND
SHALL BE CONNECTED TO THE
GROUNDING SYSTEM OF THE BUILDING, AS
CLOSE TO THE POINT OF CABLE ENTRY AS
PRACTICAL.

Example of antenna grounding as per National Electrical Code, ANSI/NFPA 70

GROUND CLAMP

ELECTRIC
SERVICE
EQUIPMENT

NEC - NATIONAL ELECTRIC CODE

Figure A

ANTENNA
LEAD IN
WIRE

ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)

GROUNDING CONDUCTORS
(NEC SECTION 810-21)

GROUND CLAMPS

POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)

4 Table of Contents / Description

2 Caution Statements

3 Important Safety Instructions

4 Table of Contents / Description

5 Specifications

6 Front Panel Controls and Indicators

7 Rear Panel Controls and Connections

8 Installation

9 Reference Chart of Off-Air and CATV Channels

10 Service / If You Need To Call For Help

11 Warranty

POWER

BCTV

The R.L. Drake MM806 is a professional quality agile
television demodulator with video and audio metering that
demodulates any VHF, UHF, or CATV channel
(54 - 806 MHz).

One MM806 may be added to a headend installation with
the combined headend output sampled with a directional
coupler and the sampled output fed to the MM806 RF
input. Any NTSC channel from the headend can be
selected and monitored on the MM806. This allows easy
setup of video and audio levels.

The desired off-air VHF or UHF television channel from
2 through 69 or CATV channel from 2 through 125 is
selected by a front panel pushwheel switch and
associated slide switch. The MM806 provides a standard
negative sync video output at a nominal level of 1 Vp-p.

MODE

CATV

CATV +100

CHANNEL

2 5

VIDEO

% MODULATION

0 20 40 60 80 100

DEPTH OF MODULATION

MM806 MODULATION MONITOR

AUDIO

% MODULATION

0 20 40 60 80 100

100% = 25 kHz PEAK

Also provided is an audio output signal. Two modulation
meters simultaneously provide readout of video
modulation percentage and audio deviation percentage of
25 kHz peak deviation.

As previously described, channel selection switches are
located on the front panel. The RF Input is through an “F”
type connector located on the rear panel. The rear panel
Video Output is also an “F” type connector.
Unbalanced Audio Output is through a rear panel RCA
type phono connector. The unit is powered through the
attached AC line cord by a nominal 115 VAC, 60 Hz
source of power.

RF

Input Frequency:

Specifications 5

54 - 806 MHz,
Off-Air: Channels 2 - 69.

CATV: Channels 2 - 125.
Input Level:
Noise Figure:

Image Rejection:

Input Impedance:

VIDEO

Output Level:
Output Impedance:

Differential Gain:

Differential Phase:

L/C Delay:

AUDIO

Output Level:
Output Impedance:

METERING

Video:

-10 to +35 dBmV.

VHF: 8 dB.

UHF: 10 dB.

VHF: 65 dB.

UHF: 50 dB.

75 Ohms.

1.0 Vp-p nominal, NTSC standard negative sync.

75 Ohms.

Less than 5%.

Less than 5 degrees.

125 nSec nominal.

300 mV rms nominal, unbalanced.

Less than 500 Ohms.

0% to 100% AM modulation. 87.5% is set point.

Audio:

GENERAL

AC Power Input:

Operating Temperature:

Dimensions:

Weight:

Connectors:

0% to 100% of 25 kHz peak FM deviation.

115 VAC ±10%, 60 Hz, 10 Watts.

00 C to +500 C, ambient.

19” W x 1.75” H x 4” D.

4.3 lbs (2.0 Kg).

RF Input and Video Output are type F.

Unbalanced Audio Output is RCA phono.

6 Front Panel Controls and Indicators

F1 F2 F3 F4 F5

POWER

BCTV

F1

- POWER Indicator

Lights when the unit is connected to the required source
of AC power.

F2

- Mode Switch

Sets the type of channel, Off-Air or CATV. The third
position sets a leading “1” for CATV channels from 100
through 125. See also Item F3 for setting the channel
number.

F3

- Channel Number Switch

Sets the received channel number for off-air TV channels
02 through 69 or for CATV channels 02 through 125. See
also Item F2 which sets the type of channel (Off-Air or
CATV) and sets the leading “1” for CATV channels 100
through 125.

For example:
Setting for CATV channel "25"-

MODE

CATV

CATV +100

Figure 1

CHANNEL

2 5

F4

- VIDEO Modulation

VIDEO

% MODULATION

0 20 40 60 80 100

DEPTH OF MODULATION

MM806 MODULATION MONITOR

AUDIO

% MODULATION

0 20 40 60 80 100

100% = 25 kHz PEAK

This meter indicates a percentage of video modulation for
the selected channel. The Desired level is 87.5%. Adjust
the video gain of the modulator being monitored to obtain
a reading of 87.5%.

F5

- AUDIO Modulation

This meter indicates a percentage of FM deviation of the
monitored channel. 100% is equal to 25 kHz peak
deviation, the NTSC standard in the U.S.A.

MODE

CATV

BCTV

CATV +100

For example:
Setting for CATV channel "125"-

MODE

CATV

BCTV

CATV +100

CHANNEL

2 5

CHANNEL

2 5

Rear P anel Controls and Connections 7

R1 R2 R3 R4 R5

R1

- RF INPUT Connector

This is the 75 Ohm input to the demodulator circuits from
an off-air television receiving antenna or from a CATV
cable input.

R2

- VIDEO OUTPUT Connector

This is the 75 Ohm baseband video output at a nominal

1.0 Vp-p level which is adjustable with the front panel
VIDEO LEVEL control over a range of approximately

0.7 to 1.5 Vp-p.

Figure 2

CAUTION:

- RISK
OF FIRE -REPLACE
FUSE AS MARKED
AFTER DISCONNECTING
UNIT FROM AC LINE

ATTENTION:

- RISQUE D'INCENDIE ­REMPLACEZ FUSIBLE DU
TYPE INDIQUE APRES
DEBRANCHER DU SECTEUR

R4

- FUSE

Always replace this fuse with one of the same type and
rating: 1/8 Amp, 250 V, SLO-BLO®, 3AG type.

R5

- LINE CORD

This is a three-wire power cable. When the cable is
connected to a properly wired AC power line outlet, this
cable grounds the instrument cabinet. Connect to a
nominal 115 VAC ±10%, 60 Hz source. Do not defeat the
safety purpose of the attached line cord plug.

R3

- AUDIO OUTPUT Connector

The RCA phono connector AUDIO OUT, provides an
unbalanced audio output.

8 Installation

TYPICAL HEADEND MONITOR APPLICATION
Choose a Tap value so the video carrier level to the
MM806 is in the 0 dBmV to +15 dBmV range.

Headend

Combiner

Modulators

RACK MOUNTING
Adequate ventilation is very important in multichannel
installations. Units should be spaced apart by at least
one panel height wherever possible, and some air
movement is advisable in enclosed rack cabinets.
Excessive heat will shorten component life and system
performance will be degraded without proper cooling.

Directional

Combined

Output

Coupler Tap

IN OUT

OUT

IN

1-WAY TAP

-30dB

5-1000 MHz

-130dB RFI

TAP

To Distribution

TAP

RF

Input

MM806

Modulators

Figure 3 -

Installation using a Directional Coupler

Headend

Combiner

Combined

Output

Output Monitor

Port

MODE

CHANNEL

VIDEO

POWER

CATV

BCTV

CATV +100

% MODULATION

2 5

0 20 40 60 80 100

DEPTH OF MODULATION

MM806 MODULATION MONITOR

AUDIO

% MODULATION

0 20 40 60 80 100

100% = 25 kHz PEAK

To Distribution

Figure 4 -

RF

Input

Installation using an Output Monitor Port

POWER

BCTV

MM806

MODE

CATV

CATV +100

CHANNEL

VIDEO

% MODULATION

2 5

0 20 40 60 80 100

DEPTH OF MODULATION

MM806 MODULATION MONITOR

AUDIO

% MODULATION

0 20 40 60 80 100

100% = 25 kHz PEAK

Reference Chart of Off-Air and CATV Channels 9

OFF-AIR CATV CATV OFF-AIR CATV CATV

OFF-AIR CATV CATV

OFF-AIR CATV CATV OFF-AIR CATV CATV

VHF BROADCAST CHANNELSVHF BROADCAST CHANNELS

VHF BROADCAST CHANNELS

VHF BROADCAST CHANNELSVHF BROADCAST CHANNELS

Channel Number

2
3
4
5
6
7
8

9
10
11
12
13

UHF BROADCAST CHANNELSUHF BROADCAST CHANNELS

UHF BROADCAST CHANNELS

UHF BROADCAST CHANNELSUHF BROADCAST CHANNELS

Channel Number

14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69

Visual Carrier

Frequency (MHz)

OFF-AIROFF-AIR

OFF-AIR

OFF-AIROFF-AIR

Visual Carrier

Frequency (MHz)

55.25

61.25

67.25

77.25

83.25

175.25

181.25

187.25

193.25

199.25

205.25

211.25

471.25

477.25

483.24

489.25

495.25

501.25

507.25

513.25

519.25

525.25

531.25

537.25

543.25

549.25

555.25

561.25

567.25

573.25

579.25

585.25

591.25

597.25

603.25

609.25

615.25

621.25

627.25

633.25

639.25

645.25

651.25

657.25

663.25

669.25

675.25

681.25

687.25

693.25

699.25

705.25

711.25

717.25

723.25

729.25

735.25

741.25

747.25

753.25

759.25

765.25

771.25

777.25

783.25

789.25

795.25

801.25

BB

B

BB

StandardStandard

Standard

StandardStandard

AA

A

AA

AlphanumericAlphanumeric

Alphanumeric

AlphanumericAlphanumeric

NN

N

NN

IdentificationIdentification

Identification

IdentificationIdentification

DD

D

DD

LL

L

LL
OO

O

OO

WW

W

WW

MM

M

MM

II

I

II

DD

D

DD

HH

H

HH

II

I

II

GG

G

GG

HH

H

HH

SS

S

SS
UU

U

UU
PP

P

PP
EE

E

EE
RR

R

RR

HH

H

HH
YY

Y

YY
PP

P

PP
EE

E

EE
RR

R

RR

CABLE TV CHANNELSCABLE TV CHANNELS

CABLE TV CHANNELS

CABLE TV CHANNELSCABLE TV CHANNELS

Channel

Designation

EIA/NCTAEIA/NCTA

EIA/NCTA

EIA/NCTAEIA/NCTA

NumericNumeric

Numeric

NumericNumeric

EquivalentEquivalent

Equivalent

EquivalentEquivalent

2
3
4
5

6
A-5
A-4
A-3
A-2
A-1

A
B
C
D
E

F

G
H

I
7
8
9

10
11
12
13

J

K

L

M
N
O
P
Q
R
S

T

U
V

W
AA
BB

CC
DD

EE
FF

GG
HH

II

JJ
KK

LL

MM
NN
OO

PP

QQ
RR

SS
TT

UU

VV

WW

XX
YY
ZZ

2
3
4
5

6
95
96
97
98
99
14
15
16
17
18
19
20
21
22

7

8

9
10
11
12
13
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62

Visual

Carrier

Frequency

(MHz)

SCASCA

SCA

SCASCA

55.25

61.25

67.25

77.25

83.25

91.25

97.25

103.25

109.25

115.25

121.25

127.25

133.25

139.25

145.25

151.25

157.25

163.25

169.25

175.25

181.25

187.25

193.25

199.25

205.25

211.25

217.25

223.25

229.25

235.25

241.25

247.25

253.25

259.25

265.25

271.25

277.25

283.25

289.25

295.25

301.25

307.25

313.25

319.25

325.25

331.25

337.25

343.25

349.25

355.25

361.25

367.25

373.25

379.25

385.25

391.25

397.25

403.25

409.25

415.25

421.25

427.25

433.25

439.25

445.25

451.25

BB

B

BB
AA

A

AA
NN

N

NN
DD

D

DD

HH

H

HH
YY

Y

YY
PP

P

PP
EE

E

EE
RR

R

RR

CABLE TV CHANNELSCABLE TV CHANNELS

CABLE TV CHANNELS

CABLE TV CHANNELSCABLE TV CHANNELS

Channel

Designation

StandardStandard

Standard

StandardStandard

AlphanumericAlphanumeric

Alphanumeric

AlphanumericAlphanumeric

IdentificationIdentification

Identification

IdentificationIdentification

AAA
BBB
CCC
DDD
EEE

FFF
GGG
HHH

III

JJJ

KKK

LLL
MMM
NNN
OOO

PPP
QQQ
RRR

SSS

TTT

UUU

VVV

WWW

XXX

EIA/NCTAEIA/NCTA

EIA/NCTA

EIA/NCTAEIA/NCTA

NumericNumeric

Numeric

NumericNumeric

EquivalentEquivalent

Equivalent

EquivalentEquivalent

63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93

94
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125

Visual

Carrier

Frequency

(MHz)

SCASCA

SCA

SCASCA

457.25

463.25

469.25

475.25

481.25

487.25

493.25

499.25

505.25

511.25

517.25

523.25

529.25

535.25

541.25

547.25

553.25

559.25

565.25

571.25

577.25

583.25

589.25

595.25

601.25

607.25

613.25

619.25

625.25

631.25

637.25

643.25

649.25

655.25

661.25

667.25

673.25

679.25

685.25

691.25

697.25

703.25

709.25

715.25

721.25

727.25

733.25

739.25

745.25

751.25

757.25

763.25

769.25

775.25

781.25

787.25

793.25

799.25

10 Service / If You Need To Call For Help

SERVICE INFORMATION

You may contact the R.L. DRAKE Service Department for
additional information or assistance by calling
[phone], Monday through Friday, between
8:00 A.M. and 4:00 P.M. Eastern Time, except on holidays.

You may also contact the R.L. DRAKE Service Department by
E-mail at the following address:
[e-mail]
or by Telefax:
[phone].

IFIF

IF YOU NEED TO CALL FOR HELP

IFIF

Call our Customer Service/Technical Support line at
[phone] between 8:00 A.M. and 4:00 P.M.
Eastern Time, weekdays. Please have the unit’s serial
number available. We will also need to know the specifics
of any other equipment connected to the unit.
When calling, please have the unit up and running, near
the phone if possible. Our technician(s) will likely ask
certain questions to aid in diagnosis of the problem. Also,
have a voltmeter handy, if possible.

R.L. DRAKE also provides technical assistance by
e-mail: [e-mail]
or by Telefax: [phone].

Should you want to return your unit for service, package
the unit carefully using the original carton or other suitable
container.

Write your return address clearly on the shipping carton
and on an enclosed cover letter describing the service
required, symptoms or problems. Also include your
daytime telephone number and a copy of your proof of
purchase.

The unit will be serviced under the terms of the
R.L. DRAKE COMPANY Limited Warranty and returned
to you.

Red is an overnight service. Send the unit in a way that it
can be traced if we can’t verify receipt of shipment. We
suggest UPS or insured postal shipment.

If the unit is still under the original owner’s warranty,
R.L. DRAKE will pay the cost of the return shipment to
you. Our return shipping policy is that we will return it UPS
Brown if received Brown or by US Mail, it will be returned
Blue if received Blue or Red—or it will be returned
however you prefer if you furnish the return cost for the
method you select.
If the unit is out of warranty, it will be returned by UPS
Brown label COD (UPS does not accept cash/currency)
unless:

Many of the products that are sent to us for repair are in
perfect working order when we receive them. For these
units, there is a standard checkout fee that you will be
charged. Please perform whatever steps are applicable
from the installation sections of the Owner's Manual
before calling or writing—this could save unnecessary
phone charges. Please do not return the unit without
contacting R.L. DRAKE first: it is preferred to help
troubleshoot the problem over the phone (or by mail) first,
saving you both time and money.

Inside the carton, enclose a note with your name,
address, daytime phone number, and a description of the
unit’s problem.
The unit must be sent to the following address:

Service Department
R.L. DRAKE COMPANY
230 Industrial Drive
Franklin, Ohio 45005 U.S.A.

Be sure to include your street address which will be
needed for UPS return. UPS Surface (Brown Label) takes
7-10 days to reach us depending on your location, Blue
takes 2-3 days.

1) It was received UPS Blue/Red, in which case it will be
returned UPS Blue/Red COD;

2) You designate billing to American ExPress, VISA,
MasterCard or Discover card;

3) You prepay the service charges with a personal check,
or

4) You specify some other method of return.
When calling, the technician can estimate the repair

charges for you over the phone. This is another good
reason to call before sending a unit in for repair.
Typically, equipment is repaired in five to ten working
days after it arrives at R.L. DRAKE if we have all the facts.
If we must call you, it may take longer. R.L. DRAKE is not
responsible for damage caused by lightning, nonprofes­sional alterations, “acts of God”, shipping damage, poor
storage/handling, etc. R.L. DRAKE will make note of any
shipping damage upon receipt.
Should your warranty card not be on file at R.L. DRAKE,
you will need to send proof of purchase to receive
warranty service. Typically, a copy of the invoice from an
R.L. DRAKE dealer will suffice. The warranty is for the
original owner only and is not transferable.

Warranty 11

Warranty

Three Y ear Limited Warranty

R.L.DRAKE COMPANY warrants to the original purchaser this product shall be free from defects in material or
workmanship for three (3) years from the date of original purchase.

During the warranty period the R.L.DRAKE COMPANY or an authorized Drake service facility will provide, free of
charge, both parts and labor necessary to correct defects in material and workmanship. At its option, R. L. DRAKE
Company may replace a defective unit.

To obtain such a warranty service, the original purchaser must:

(1) Complete and send in the Warranty Registration Card within 10 days of purchase.
(2) Notify the R.L.DRAKE COMPANY or the nearest authorized service facility, as soon as possible after discovery of

a possible defect, of:
(a) the model and serial number,
(b) the identity of the seller and the approximate date of purchase; and
(c) A detailed description of the problem, including details on the electrical connection to associated equipment and the
list of such equipment.

(3) Deliver the product to the R.L.DRAKE COMPANY or the nearest authorized service facility, or ship the same in its
original container or equivalent, fully insured and shipping charges prepaid.

Correct maintenance, repair, and use are important to obtain proper performance from this product. Therefore carefully
read the Instruction Manual. This warranty does not apply to any defect that R.L.DRAKE COMPANY determines is
due to:

(1) Improper maintenance or repair, including the installation of parts or accessories that do not conform to the quality
and specifications of the original parts.

(2) Misuse, abuse, neglect or improper installation.
(3) Accidental or intentional damage.

All implied warranties, if any, including warranties of merchantability and fitness for a particular purpose, terminate
three (3) years from the date of the original purchase.

The foregoing constitutes R.L.DRAKE COMPANY’S entire obligation with respect to this product, and the original
purchaser shall have no other remedy and no claim for incidental or consequential damages, losses or expenses. Some
states do not allow limitations on how long an implied warranty lasts or do not allow the exclusions or limitation of
incidental or consequential damages, so the above limitation and exclusion may not apply to you.

This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
This warranty shall be construed under the laws of Ohio.

For Service, contact:

R.L. DRAKE COMPANY

230 Industrial Drive

Franklin, Ohio 45005 U.S.A.

Customer Service and Parts Telephone: [phone]

Telefax: [phone]

World Wide Web Site: http://www.rldrake.com

R.L. Drake Company

230 Industrial Drive

Franklin, Ohio 45005 U.S.A.

Customer Service and Parts Telephone: [phone]

Telefax: [phone]

World Wide Web Site: http://www.rldrake.com

MM806 Modulation Monitor Specifications Sheet

For: Direct A/V Inc.

RF

Input Frequency:

Input Level:

Noise Figure:

Image Rejection:

Input Impedance:

VIDEO

Output Level:
Output Impedance:

Differential Gain:

Differential Phase:

L/C Delay:

AUDIO

Output Level:
Output Impedance:

MM806 MODULATION MONITOR

AUDIO

% MODULATION

0 20 40 60 80 100

100% = 25 kHz PEAK

POWER

MODE

CATV

BCTV

CATV +100

CHANNEL

2 5

VIDEO

% MODULATION

0 20 40 60 80 100

DEPTH OF MODULATION

54 - 806 MHz,
Off-Air: Channels 2 - 69.
CATV: Channels 2 - 125.

-10 to +35 dBmV.
VHF: 8 dB; UHF: 10 dB.
VHF: 65 dB; UHF: 50 dB.
75 Ohms.

1.0 Vp-p nominal, NTSC standard negative sync.
75 Ohms.
Less than 5%.
Less than 5 degrees.
125 nSec nominal.

300 mV rms nominal, unbalanced.
Less than 500 Ohms.

METERING

Video:

Audio:

GENERAL

AC Power Input:

Operating Temperature:

Dimensions:

Weight:

Connectors:

Specifications subject to change without notice or obligation.

R.L. Drake Company

230 Industrial Drive
Franklin, Ohio 45005 U.S.A.

Sales: [phone]
Telefax: [phone]
World Wide Web Site: http://www.rldrake.com

0% to 100% AM modulation. 87.5% is set point.
0% to 100% of 25 kHz peak FM deviation.

115 VAC ±10%, 60 Hz, 10 Watts.
00 C to +500 C, ambient.
19” W x 1.75” H x 4” D.

4.3 lbs (2.0 Kg).
RF Input and Video Output are type F. Balanced
Audio Unbalanced Audio Output is RCA phono.

®

© Copyright 2001 R. L. Drake Company