Rolls RD320 User manual

RD320
Digital Room Delay
OWNERS MANUAL
LIMITED WARRANTY
This product is warranted to the original consumer purchaser to be free
from defects in materials and workmanship under normal installation, use and
service for a period of one (1) year from the date of purchase as shown on the
purchaser’s receipt.
The obligation of Rolls Corporation under this warranty shall be limited
to repair or replacement (at our option), during the warranty period of any part
which proves defective in material or workmanship under normal installation,
use and service, provided the product is returned to Rolls Corporation, TRANS-
PORTATION CHARGES PREPAID. Products returned to us or to an authorized
Service Center must be accompanied by a copy of the purchase receipt. In the
absence of such purchase receipt, the warranty period shall be one (1) year from
the date of manufacture.
This warranty shall be invalid if the product is damaged as a result of
defacement, misuse, abuse, neglect, accident, destruction or alteration of the
serial number, improper electrical voltages or currents, repair, alteration or
maintenance by any person or party other than our own service facility or an
authorized Service Center, or any use violative of instructions furnished by us.
This one-year warranty is in lieu of all expressed warranties, obligations
or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR LIABILI-
TIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,
SHALL BE LIMITED IN DURATION TO THE ONE YEAR DURATION OF
THIS WRITTEN LIMITED WARRANTY. Some states do not allow limitations
on how long an implied warranty lasts, so the above limitation may not apply to
you. IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCI-
DENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR
ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, WHATSOEVER.
Some states do not allow the exclusion or limitation of special, incidental or
consequential damages so the above limitation or 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.
ROLLS CORPORATION
SALT LAKE CITY, UTAH
7/99
+16 +10 0 -7 -13
INPUT LEVEL
INPUT
LEVEL OUTPUT
LEVEL
D IG IT A L
DELAY
RD320
MS uS
5 10 20 40 80 160
PWR
SPECIFICATIONS
Max. Input: +16 dBV
InputImpedance: 10kΩbalanced
Output Impedance: 50 Ωbalanced
Delay Range (long): .005 to .320 Sec.
Delay Resolution (long): .005 Sec.
Delay Range (short): .00004 Sec. to .00128
Delay Resolution (short): .00004 Sec (Approx 1/2 the Long range and res.)
Frequency Response: 20Hz to 20kHz (+/-3 dB)
THD: .09%
Size: 1.75” H x 19”W x 5.25” D.
Weight: 7 lbs.

INTRODUCTION
The RD320 Digital Delay is used for speaker distance delay or speaker time
alignment.The RD320 is housed in a single rack space chassis, and has two
delay modes selected by a shorting jumper behind the front panel security cover.
It provides a delay range of either 5 - 320 milliseconds, or 40 - 1280 microsec-
onds.The delay is easily set from the front panel by setting the DIP switches, and
the input and output levels are adjusted via front panel trim potentiometers.
DESCRIPTION
FRONT PANEL
+16 +10 0 -7 -13
INPUT LEVEL
D IG IT A L
DELAY
RD320
INPUT
LEVEL OUTPUT
LEVEL MS uS
5 10 20 40 80 160
PWR
INPUT LEVEL LEDs:Indicate the amount of input signal level, in decibels.
INPUT LEVEL: Adjusts the amount of input signal.
OUTPUT LEVEL: Adjusts the amount of output signal.
DIP SWITCHES:Set the delay time
MS:If the shorting jumper is in this position, the long delay time has been se-
lected.
µS:When the jumper is in this position, the short delay time has been selected.
PWR:Indicates that the RD320 has power and the power switch is in the ON
position.
REAR PANEL
OUT IN
+ - - +
MODEL RD320
120 VAC
50/60 Hz 15 VA
SERIAL NUMBER
320-
NRTL/C
WARNING:
To reduce the risk of
electric shock or fire, do not expose
this device to rain or moisture.
CAUTION:
To reduce the risk of
electric shock do not remove lid. No user
serviceable parts inside. Refer servicing
to qualified service personnel.
RISQUE DE CHOC - NE PAS ENLEVER
MADE IN U.S.A
OUT:The“+”sign indicates the positive or non-inverting terminal, and the“-”
indicates the negative or inverting terminal. Use these, along with the Ground
terminal for a balanced output.
IN:The “+” sign indicates the positive or non-inverting terminal, and the “-” indi-
cates the negative or inverting terminal. Use these, along with the Ground termi-
nal for a balanced input.
OPERATION
Setting the Input and Output levels
Use the LED bargraph for setting the input level.With a typical sound level input,
set the Input level as high as possible so the 0 dB LED is on approximately all the
time, and the red +16 dB LED lights occasionally - only on the highest peaks.Set
the output level to drive the power amp or signal processing that follows the delay.
The input level range is from -infinity to unity gain.Remember to run the input level
as high as possible without clipping to achieve the highest signal to noise ratio.
The output level is from 0dB to 15dB gain.That means the output level never cuts
off the input level.
OPERATION Cont.
Selecting the Delay range
Selecting the delay range is done by moving the shorting jumper on the front
panel to the desired position.Either the long position (MS) for room time delay, or
the short position (µS) for speaker driver alignment.
Figuring the LongTime Delay
Time delay in milliseconds (MS) is figured by adding the DIP switch ON (Switch
Down) positions then add 5.
Example, If the 5 and 80 switches are down, the delay time is
5 + 80 + 5 = 90 milliseconds of delay time.
Figuring the Short DelayTime
In the short position, figure the long time delay time, then divide by 128.For
example, the minimum time delay is 5 milliseconds in the long position.In the
short position it would be;5 / 128 = 39µS (or .000039 sec).The speed of sound at
sea level is approximately 1100 feet/second.So that would be 1100 x .000039 =
.043 feet, or multiplied by 12 inches = .51 inches.
SCHEMATIC
1
ROLLS CORPORATION
5143 South Main Street
Salt Lake City, UT 84107
14-May-1999
Title
Size: Document Number:
Date:
Rev:
Sheet of
Rb
DIGITALDELAY RD320
D
-12V
+5V
+5V
+12V
+5V
+12V
+12V
+12V
+12V-12V
+5V
+5V
+12V
+12V
+12V
+5V
+5V
VCC VDD +5V
-12V -12V -12V
-12V
-12V
VSS
+5V
+5V
320M S
40uS
5
10
20
40
80
160
IN
OUT
+12V
-12V
-12V -12V -12V -12V -12V
+12V +12V +12V +12V +12V
+5V +5V +5V +5V +5V +5V +5V +5V +5V
320
640
+5V
VREF
+5V
9
18
+5V
7
+5V
14
FO R 1280M S US E 4464 VREF
10K 1%
R5
47K
R6
10K
P1
100K TP
R7
10K
R9
10K
R13
10K
R21
10K
R22
10K
R23
10k R24
10K R27
10K
R28
51
R31
51
1
H2A
HD5
R11
10K
R10
100
R1
10K
R43
10K R44
10K
R45
10K
D11
1N 4001
D13
1N 4001
D12
1N 4001
D14
1N 4001
I
1
G
2
O
U22
7805
3
H2C
R30
10K
I
1
G
2
O
U21
7812
I
2
G
1
O3
U29
7912
C34
1U
C35
1U
VOUT
1D11
2D10
3D9
4D8
5D7
6D6
7D5
8D4
9D3
10 D3
11 DGND
12 D1 13
D0 14
WR 15
CS 16
VREF 17
AGND 18
VSSA 19
VDDA 20
RA 21
RB 22
RC 23
RFB 24
U19
M A X 502
A0
14 A1
13 A2
12 A3
11 A4
8A5
7A6
6A7
10
RAS
5CAS
16
G
1WE
4
D0 2
D1 3
D2 15
D3 17
U18
4416
A0
14 A1
13 A2
12 A3
11 A4
8A5
7A6
6A7
10
RAS
5CAS
16
G
1WE
4
D0 2
D1 3
D2 15
D3 17
U16
4416
1A
21Y 4
1B
3
2A
52Y 7
2B
6
3A
11 3Y 9
3B
10
4A
14 4Y 12
4B
13
A/B
1G
15
GND
8VCC 16
U15
74H C 157
1A
21Y 4
1B
3
2A
52Y 7
2B
6
3A
11 3Y 9
3B
10
4A
14 4Y 12
4B
13
A/B
1G
15
GND
8VCC 16
U14
74H C 157
CLK
1
RST
2Q1 12
Q2 11
Q3 9
Q4 6
Q5 5
Q6 4
Q7 3
U11
4024
P0
4Q0 6
P1
12 Q1 11
P2
13 Q2 14
P3
3Q3 2
CI
5CO 7
CLK
15 PE
1B/D
9U/D
10
U12
4029
P0
4Q0 6
P1
12 Q1 11
P2
13 Q2 14
P3
3Q3 2
CI
5CO 7
CLK
15 PE
1B/D
9U/D
10
U13
4029
CLK
1
RST
2Q1 12
Q2 11
Q3 9
Q4 6
Q5 5
Q6 4
Q7 3
U7
4024
C14
25PF
C12
25PF
C11
10U
D5
D6
D8
D7
C3
.0056
C9
1U
C4
.0012
C5
120PF
C6
.0056
C7
10U
C20
.0015
C22
120PF
C21 .0056
C23
.0015
C25
120PF
C24
.0056
R42
10K
R49
10K
D9
R29
10K
C27
.0056
R26
47K
D3
1N 4148
R33
100K
D4
1N 4148
R32
10K
1E1 1
E2
1
E3
R39
1K
A0
14 A1
13 A2
12 A3
11 A4
8A5
7A6
6A7
10
RAS
5CAS
16
G
1WE
4
D0 2
D1 3
D2 15
D3 17
U17
4416
R12
75K
1
2
3
4
5
6
7
8
9
U6
BA6144
D 1 1N 4148
R15
10K
R16
100K
X1
3.2768
R36 1M
R51
10K
RES
R48
10K
D2
1N 4148
1
2
3
4
JP 1
HEADER 4
HD4
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SW 1
SW DIP-8
DIPSW -8
R53
1M
C39
10U
R54
1M
Q 1 J113
R55
1K
R56
10K
C1 470PF
BP6
503
BP7
503
BP8
503
BP9
503
BP10
503
BP11
503
BP5
503
BP1
503
BP2
503
BP3
503
BP4
503
BP13
503
BP14
503
BP16
503
BP17
503
C38
503
D17
1N 4148
R37
2K
R47
10K
R46
10K
R52
10K
4
5
H2E
HD5
C28
10U
C29
10U
R50
10K
D15
LDRR
9 8
U9D 74HC04
C8
10U
R18
1K
DRDY
1
D1
3D2
4D3
5
VSS
12 VAA- 16
D8
10 D7
9D5
7
VAA+ 17
D11
14
OEM 15
D6
8
VIN 18
VREF+ 19
VREF- 20
STRT 21
VDD 24
OEL 23
D4
6CLK 22
D0
2
D9
11 D10
13
U10
H I5812
2
31
4
U1A
4560
6
57
8
U1B
4560 2
31
4
U2A
4560
6
57
8
U2B
4560
6
57
8
U3B
4560
2
3
1
4
U5A
4560
6
57
8
U5B
4560
6
57
8
U4B
4560
R8
10K
R20
10K
1312
U9F
74HC04
1 2
U9A 74HC04
3 4
U9B
74HC04
11 10
U9E 74HC04
5 6
714
U9C 74HC04
C2
120PF
C15
102
C13 120PF
R2
10K
R19
10K 1%
R17
10K 1%
C10
120PF
R57 1K
C32 470PF
A
1QA 3
B
2QB 4
QC 5
QD 6
QE 10
CLK
8QF 11
QG 12
CLR
9QH 13
U8
74H C 164
R35
10K R34
10K
C30
10U
P2
100K TP
2
31
4
U3A
4560
C26
10U
R25
4.7K
2
31
4
U4A
4560
C36
1000uf
R40
1K
D10
1N 4148
R41
10K
C31
470PF
C33
10U
C18
503
2
H2B
HD5
R14
4.7K
R3 10K
R4
10K
+5V