Download FREQUENCY SYNTHESーZER UNーT DSG

FREQUENCY SYNTHESiZER UNIT DSG口
USER'S MANUAL
DlGITAL SiGNAL TECHNOLOGY,lNC.
1‐
6‐
28,HIGASHI BENZAl,ASAKA CiTY
SAITAMA,JAPAN 351-0022
TEL:81-48‐ 468-6094
FAX:81-48-468‐ 6210
URL:亜 p
魏
e‐
mail i infQ蛭
2dstiCO,控
2235
1.Descttptton
The prograrnrnable PLL unit DSG-2235 can generate any desired signal from
2250MHz to 3550MHz with l Hz resolutton.
2. Speci¶ caばon
2-1.Electricai specification
(1)Outputfrequency range:
2250MHz-3550MHz
(2)Frequency resolution:
lHz
(3)Outputlevel i
lodBm±
(4)OutpuHmpedance:
50Ω
2dB
± lppm
(5)Frequency stability:
(6)Phase nOise:
9odBc/Hz at100KHz
(7)SpuriOus:
less than-55dBc
(8)HarmOnics sputtous:
less than-10dBc
5+%6,Vl±
ess than l A
(9)Supply voltage/current i
卜1 5 V ±1 0 % , l e s s t h a n O . 2 A
(10)HOW tO Setfrequency:
RS-232C asynchronous settal data
2‐2 Environment Specittcations
(1)Operattng temperature range
C― +50°C
O°
2-3 Construction and dirnenslons
(1)Dimensions:
125xl1 0x27mrn
(nOtincluding connectors)
See the drawin9 of井0010785
(2)Output COnnectori
J
SMA―
(3)Reference input connector i
SMA― J
(4)Frequency control connectOr:
D‐SUB 9 pin female
(5)Power Supply:
(6)WVeight i
Feed‐
460g
through capacitorlead
3 Control cornmand
3口l Asynchronous Conlrnunication setttng
speed
9600BPS
data length
8 bit
stop bit
pattty
flow control
l bit
None
None
3‐
2D― SUB 9 pin connector pin assign『lent
pin tt signai name
l
CD
口>terrninal
equipmentく
not used
2
RD
→
3
TD
←
4
5
Rernarks
not used
GND
6
DSR
not used
7
RTS
not used
3‐
3 Type of controi command
(1)Frequency setttng command
This is to set output frequency
(2)STAT cottmand
This is to confirrn the setting value.
(3)SAVE command
This is to rnernorize the current freqじ
ency
(4)EXT cornmand
This is to switch the reference ciock input source to internal or external.
4 Details of the control cornrnand
4‐l De村nidon
Character stttngs with“
“
is ASCH code.CR,LF are the control cornmand and
rnean OD(hex1 0r oA(hexl.if the data forrnat is not correct or some errors
occurred duttng the transfer,“ !NVALIDll"LF CR"*"wi‖
cornrnand is transferred correctly,
be returned.When the
* code is returned.
DSG-2235 is
echo―backed a‖ input data.
4-2 Frequency setJng cornrnand
Frequency data can be entered in three differenttypes offorrnats,爪
川Hz,KHz and
Hzロ
(1)HOW tO Setfrequency at MHz unit
The exarYlple below shows the data of setttng 2479MHz.
“
2479M"CR
in this case the data under 100KHz is set``0''.
(2)How tO Setfrequency at KHz unit
The example below shows the data of settin9 2479001 KHz.
“
2479001<'CR
in this case the data under 100Hz is set“
0''.
(3)How tO Setfrequency at Hz unit
The example below shows the data of setttng 2479000001 Hz.
“
2479000001"CR
Cautions:When DSG-2235 has opttonal frequency divider,
the output frequency is divided according to the optiani divider ratioロ
4-3 STAT command
When“ STAT"CR is entered,the current status of DSG-2235 is obtained.
The response forrnatis as foHows:
“
fFW""Hz",sssSSS"CR LF"*"
“
f....…
B "shOWS the present outputfrequency at Hz.``ssssS''Shows the status of
PLL lock,displayed“
LOCK"OR“
UNLOCKED"
4-4 SAVE command
When “ SAVE"CR is entered, thё
current frequency can be mernorized into
non―volattle RAM.When poweris off and on again,the stored frequency can be
retrieved.
4-5 EXT cornmand
VVhen“ EXT''CR is entered,the status of reference ciock source is displayed as
ows.
fo‖
“
CURRENT CLOCK SOURCElS E⇒
XttX"
“
Do you wantto change ciock source?o″
N)"
'oriNTERNハ
y00000C ShOuld be displayed“
EXTERNAピ
L".lf changed,input“
hr'.
5,Cauttons
5‐l Useぃ e power supply stabilized by 10w nOise settes regulators,WVhen the
switching power supply is used,use fiterto reduce switching noise frorn power
supply,
5‐
2 Attach DSG‐ 2235 side panel to chassis or heat sinkぬ ot to raise the unit's
temparature
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