Download FREQUENCY SYNTHESーZER UNーT DSG
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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 ゆ ∞ 卜 〇 ヤO ρ 難 E2 督 き tキ & コ 辞 新 翼 中殺 , 螢翁 α 軍 区 0